Removed contribution and adjusted license

Author: unitysipu

CODE_OF_CONDUCT.md

@@ -0,0 +1,5 @@
+Unity Robotics Hub copyright © 2020 Unity Technologies.
+
+This software is subject to, and made available under the Apache 2.0 license (the “License”). You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0
+
+Unless expressly provided otherwise, the software under this license is made available strictly on an “AS IS” BASIS WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. Please review the Terms of Service for details on these and other terms and conditions. 

CONTRIBUTING.md

@@ -101,8 +101,6 @@ ROS2 support is now available! You can get started by following [this tutorial](
 ## Community and Feedback
 
 The Unity Robotics projects are open-source and we encourage and welcome contributions.
-If you wish to contribute, be sure to review our [contribution guidelines](CONTRIBUTING.md)
-and [code of conduct](CODE_OF_CONDUCT.md).
 
 ## Support
 
@@ -120,4 +118,4 @@ To get notified about new updates and features, [sign up for our newsletter](htt
 [FAQs](faq.md)
 
 ## License
-[Apache License 2.0](LICENSE)
+[Apache License 2.0](LICENSE.md)