Update CONTRIBUTING.md

Author: ngerakines

CONTRIBUTING.md

@@ -1,12 +1,9 @@
 # Rules For Contributing
 
 ## Sorting
-When adding commit messages to the project, please sort the list of commit messages before you submit the pull request.
 
-### Linux / OSX:
-`sort -o commit_messages.txt commit_messages.txt`
-### Windows
-`sort commit_messages.txt /o commit_messages.txt`
+Don't bother sorting the file. Every now and then I'll sort and clean it up.
 
 ## License
+
 By contributing to this project, you agree to license your contributions as open source with the MIT license.