Update CONTRIBUTING.md

cleaning up

Author: parispittman

CONTRIBUTING.md

@@ -1,9 +1,4 @@
-## Legal
-
-By submitting a pull request, you represent that you have the right to license
-your contribution to Apple and the Swift project, and agree by submitting the
-patch that your contributions are licensed under the Apache 2.0 license (see
-`LICENSE.txt`).
+# Contributing to swift-cmake-examples 
 
 ## How to submit a bug report