diff --git a/examples/worlds/lift_drag.config b/examples/worlds/lift_drag.config
deleted file mode 100644
index 9cbb21b9617..00000000000
--- a/examples/worlds/lift_drag.config
+++ /dev/null
@@ -1,236 +0,0 @@
-<?xml version="1.0"?>
-
-<window>
-    <position_x>0</position_x>
-    <position_y>0</position_y>
-    <state></state>
-    <width>1200</width>
-    <height>800</height>
-    <style
-      material_theme="Light"
-      material_primary="#9e9e9e"
-      material_accent="#03a9f4"
-      toolbar_color_light="#f3f3f3"
-      toolbar_text_color_light="#111111"
-      toolbar_color_dark="#414141"
-      toolbar_text_color_dark="#f3f3f3"
-      plugin_toolbar_color_light=""
-      plugin_toolbar_text_color_light=""
-      plugin_toolbar_color_dark=""
-      plugin_toolbar_text_color_dark=""/>
-    <menus>
-        <drawer visible="true" default="false"/>
-        <plugins visible="true" from_paths="true"/>
-    </menus>
-</window>
-<plugin filename="MinimalScene" name="3D View">
-    <gz-gui>
-        <title>3D View</title>
-        <property key="showTitleBar" type="bool">false</property>
-        <property key="state" type="string">docked</property>
-    </gz-gui>
-    <engine>ogre2</engine>
-    <scene>scene</scene>
-    <ambient_light>0.4 0.4 0.4</ambient_light>
-    <background_color>0.8 0.8 0.8</background_color>
-    <camera_pose>-6 0 6 0 0.5 0</camera_pose>
-    <camera_clip>
-        <near>0.01</near>
-        <far>10000.0</far>
-    </camera_clip>
-</plugin>
-<plugin filename="EntityContextMenuPlugin" name="Entity context menu">
-    <gz-gui>
-        <property key="width" type="double">5</property>
-        <property key="height" type="double">5</property>
-        <property key="state" type="string">floating</property>
-        <property key="showTitleBar" type="bool">false</property>
-    </gz-gui>
-</plugin>
-<plugin filename="GzSceneManager" name="Scene Manager">
-    <gz-gui>
-        <property key="width" type="double">5</property>
-        <property key="height" type="double">5</property>
-        <property key="state" type="string">floating</property>
-        <property key="showTitleBar" type="bool">false</property>
-        <property key="resizable" type="bool">false</property>
-    </gz-gui>
-</plugin>
-<plugin filename="InteractiveViewControl" name="Interactive view control">
-    <gz-gui>
-        <property key="width" type="double">5</property>
-        <property key="height" type="double">5</property>
-        <property key="state" type="string">floating</property>
-        <property key="showTitleBar" type="bool">false</property>
-        <property key="resizable" type="bool">false</property>
-    </gz-gui>
-</plugin>
-<plugin filename="CameraTracking" name="Camera Tracking">
-    <gz-gui>
-        <property key="width" type="double">5</property>
-        <property key="height" type="double">5</property>
-        <property key="state" type="string">floating</property>
-        <property key="showTitleBar" type="bool">false</property>
-        <property key="resizable" type="bool">false</property>
-    </gz-gui>
-</plugin>
-<plugin filename="MarkerManager" name="Marker manager">
-    <gz-gui>
-        <property key="width" type="double">5</property>
-        <property key="height" type="double">5</property>
-        <property key="state" type="string">floating</property>
-        <property key="showTitleBar" type="bool">false</property>
-        <property key="resizable" type="bool">false</property>
-    </gz-gui>
-</plugin>
-<plugin filename="SelectEntities" name="Select Entities">
-    <gz-gui>
-        <property key="width" type="double">5</property>
-        <property key="height" type="double">5</property>
-        <property key="state" type="string">floating</property>
-        <property key="showTitleBar" type="bool">false</property>
-        <property key="resizable" type="bool">false</property>
-    </gz-gui>
-</plugin>
-<plugin filename="Spawn" name="Spawn Entities">
-    <gz-gui>
-        <property key="width" type="double">5</property>
-        <property key="height" type="double">5</property>
-        <property key="state" type="string">floating</property>
-        <property key="showTitleBar" type="bool">false</property>
-        <property key="resizable" type="bool">false</property>
-    </gz-gui>
-</plugin>
-<plugin filename="VisualizationCapabilities" name="Visualization Capabilities">
-    <gz-gui>
-        <property key="width" type="double">5</property>
-        <property key="height" type="double">5</property>
-        <property key="state" type="string">floating</property>
-        <property key="showTitleBar" type="bool">false</property>
-        <property key="resizable" type="bool">false</property>
-    </gz-gui>
-</plugin>
-<plugin filename="WorldControl" name="World control">
-    <gz-gui>
-        <title>World control</title>
-        <anchors target="3D View">
-            <line own="left" target="left"/>
-            <line own="bottom" target="bottom"/>
-        </anchors>
-        <property key="z" type="double">1</property>
-        <property key="width" type="double">145</property>
-        <property key="height" type="double">72</property>
-        <property key="state" type="string">floating</property>
-        <property key="showTitleBar" type="bool">false</property>
-        <property key="resizable" type="bool">false</property>
-    </gz-gui>
-    <play_pause>true</play_pause>
-    <step>true</step>
-    <start_paused>true</start_paused>
-    <use_event>true</use_event>
-</plugin>
-<plugin filename="WorldStats" name="World stats">
-    <gz-gui>
-        <title>World stats</title>
-        <anchors target="3D View">
-            <line own="right" target="right"/>
-            <line own="bottom" target="bottom"/>
-        </anchors>
-        <property key="z" type="double">1</property>
-        <property key="width" type="double">290</property>
-        <property key="height" type="double">110</property>
-        <property key="state" type="string">floating</property>
-        <property key="showTitleBar" type="bool">false</property>
-        <property key="resizable" type="bool">false</property>
-    </gz-gui>
-    <sim_time>true</sim_time>
-    <real_time>true</real_time>
-    <real_time_factor>true</real_time_factor>
-    <iterations>true</iterations>
-</plugin>
-<plugin filename="Shapes" name="Shapes">
-    <gz-gui>
-        <property key="x" type="double">0</property>
-        <property key="y" type="double">0</property>
-        <property key="width" type="double">250</property>
-        <property key="height" type="double">50</property>
-        <property key="state" type="string">floating</property>
-        <property key="showTitleBar" type="bool">false</property>
-        <property key="resizable" type="bool">false</property>
-        <property key="cardBackground" type="string">#666666</property>
-    </gz-gui>
-</plugin>
-<plugin filename="Lights" name="Lights">
-    <gz-gui>
-        <property key="x" type="double">250</property>
-        <property key="y" type="double">0</property>
-        <property key="width" type="double">150</property>
-        <property key="height" type="double">50</property>
-        <property key="state" type="string">floating</property>
-        <property key="showTitleBar" type="bool">false</property>
-        <property key="resizable" type="bool">false</property>
-        <property key="cardBackground" type="string">#666666</property>
-    </gz-gui>
-</plugin>
-<plugin filename="TransformControl" name="Transform control">
-    <gz-gui>
-        <property key="x" type="double">0</property>
-        <property key="y" type="double">50</property>
-        <property key="width" type="double">250</property>
-        <property key="height" type="double">50</property>
-        <property key="state" type="string">floating</property>
-        <property key="showTitleBar" type="bool">false</property>
-        <property key="resizable" type="bool">false</property>
-        <property key="cardBackground" type="string">#777777</property>
-    </gz-gui>
-    <!-- disable legacy features used to connect this plugin to GzScene3D -->
-    <legacy>false</legacy>
-</plugin>
-<plugin filename="Screenshot" name="Screenshot">
-    <gz-gui>
-        <property key="x" type="double">250</property>
-        <property key="y" type="double">50</property>
-        <property key="width" type="double">50</property>
-        <property key="height" type="double">50</property>
-        <property key="state" type="string">floating</property>
-        <property key="showTitleBar" type="bool">false</property>
-        <property key="resizable" type="bool">false</property>
-        <property key="cardBackground" type="string">#777777</property>
-    </gz-gui>
-</plugin>
-<plugin filename="CopyPaste" name="CopyPaste">
-    <gz-gui>
-        <property key="x" type="double">300</property>
-        <property key="y" type="double">50</property>
-        <property key="width" type="double">100</property>
-        <property key="height" type="double">50</property>
-        <property key="state" type="string">floating</property>
-        <property key="showTitleBar" type="bool">false</property>
-        <property key="resizable" type="bool">false</property>
-        <property key="cardBackground" type="string">#777777</property>
-    </gz-gui>
-</plugin>
-<plugin filename="ComponentInspector" name="Component inspector">
-    <gz-gui>
-        <property key="state" type="string">docked_collapsed</property>
-        <property key="showTitleBar" type="bool">true</property>
-        <property key="resizable" type="bool">true</property>
-    </gz-gui>
-</plugin>
-<plugin filename="EntityTree" name="Entity tree">
-    <gz-gui>
-        <property key="state" type="string">docked_collapsed</property>
-        <property key="showTitleBar" type="bool">true</property>
-        <property key="resizable" type="bool">true</property>
-    </gz-gui>
-</plugin>
-<plugin filename="VisualizeForces" name="Visualize Forces">
-    <gz-gui>
-        <title>Visualize Forces</title>
-        <property key="state" type="string">docked</property>
-        <property key="showTitleBar" type="bool">true</property>
-        <property key="resizable" type="bool">true</property>
-    </gz-gui>
-    <scale>1</scale>
-    <update_rate>1</update_rate>
-</plugin>