Update pull_request_template.md

.github/pull_request_template.md

@@ -1,12 +1,7 @@
 <!--
 Thank you for submitting a PR!
 
-Please make sure you are targeting the main branch instead of stable and that all contributors have signed the Contributor License Agreement.
-
-This simply gives us permission to use and redistribute your contributions as part of the project.
-Head over to https://cla.developers.google.com/ to see your current agreements on file or to sign a new one.
-
-This project follows https://opensource.google.com/conduct/
+Please make sure you are targeting the main branch instead of stable. 
 
 Thanks!
 -->