Add license header, remove redundant lines

examples/external_cpp_stage/morpheus_ex/external_cpp_stage/__init__.py

@@ -1,6 +1,17 @@
-from . import _version
-
-__version__ = _version.get_versions()['version']
+# Copyright (c) 2023, NVIDIA CORPORATION.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 
 from . import _version
+
 __version__ = _version.get_versions()['version']