Updating CONTRIBUTING.rst by removing CHANGES.rst (#1406)
Updating CONTRIBUTING.rst by removing CHANGES.rst (#1406)

CHANGES.rst is not anymore used. Removed the outdated information.
emanlove/robotframework-selenium2library,robotframework/SeleniumLibrary,robotframework/SeleniumLibrary,rtomac/robotframework-selenium2library,rtomac/robotframework-selenium2library,robotframework/SeleniumLibrary,emanlove/robotframework-selenium2library,emanlove/robotframework-selenium2library,rtomac/robotframework-selenium2library