removing default grid variables

sass/partials/_variables.scss

@@ -130,46 +130,3 @@ $cursor-text-value: text !default;
 // We use these to make sure border radius matches unless we want it different.
 $global-radius: 3px !default;
 $global-rounded: 1000px !default;
-
-
-// ** Breakpoints ** //
-
-// Mobile is default
-$small: 500px;
-$medium: 800px;
-$large: 1100px;
-$xlarge: 1400px;
-
-// Old IE support
-$breakpoint-no-query-fallbacks: true;
-$no-query: '.lt-ie9';
-
-
-// ** Grids ** //
-
-// Mobile is default
-$grids: add-grid(3);
-$grids: add-grid(6 at $small);
-$grids: add-grid(18 at $medium);
-$grids: add-grid(30 at $large);
-
-$gutters: add-gutter(1/5);
-$gutters: add-gutter(1/3 at $small);
-$gutters: add-gutter(1/2 at $medium);
-$gutters: add-gutter(1 at $large);
-
-$output: 'isolation';
-
-// Grid color for debugging
-$background-grid-color: rgba(117, 125, 138, 1);
-
-
-// ** Layout ** //
-
-// Mobile is default
-$container-width: 320px;
-
-$small-container-width: 480px;
-$medium-container-width: 720px;
-$large-container-width: 960px;
-$xlarge-container-width: 1200px;