Update contributing.md file (#151)

Author: mhucka

CONTRIBUTING.md

@@ -18,13 +18,6 @@ on file or to sign a new one. You generally only need to submit a Google CLA
 once, so if you've already submitted one (even if it was for a different
 project), you probably don't need to do it again.
 
-> [!WARNING]
-> Please note carefully clauses [#5](https://cla.developers.google.com/about/google-corporate#:~:text=You%20represent%20that%20each%20of%20Your%20Contributions%20is%20Your%20original%20creation)
-> and [#7](https://cla.developers.google.com/about/google-corporate#:~:text=Should%20You%20wish%20to%20submit%20work%20that%20is%20not%20Your%20original%20creation%2C%20You%20may%20submit%20it%20to%20Google%20separately)
-> in the CLA. Any code that you contribute to this project must be **your**
-> original creation. Code generated by artificial intelligence tools **does
-> not** qualify as your original creation.
-
 ### Review our community guidelines
 
 We have a [code of conduct](CODE_OF_CONDUCT.md) to make the project an open and
@@ -42,8 +35,8 @@ new [git branch](https://docs.github.com/articles/about-branches) in this fork
 to do your work, and when ready, create a pull request from your branch to the
 main project repository.
 
-We follow the [Google coding style](https://google.github.io/styleguide/) for
-the programming languages used in this project, with only a few deviations. The
-[`.editorconfig`](.editorconfig) file in this repository defines the settings
-we use. Please run `clang-format` on any modified C++ files before submitting a
-pull request.
+We follow the [Google coding style guides](https://google.github.io/styleguide/)
+for the programming languages used in this project, with only a few deviations.
+The [`.editorconfig`](.editorconfig) file in this repository defines the
+settings we use. Please run `clang-format` on any modified C++ files before
+submitting a pull request.