Clean up CONTRIBUTING.md

Removed unnecessary lines and streamlined the content.

Author: Amanbig

CONTRIBUTING.md

@@ -1,5 +1,3 @@
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 # Contributing to runapi
 
 Thank you for your interest in contributing to **runapi** 🚀
@@ -216,7 +214,3 @@ Maintainers are happy to help 🙂
 
 Your time and effort make **runapi** better for everyone.
 Thanks for contributing!
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-Just say what you want next 🚀