dillon1000/react

Kill ReactLink, LinkedStateMixin, valueLink and checkedLink (#8165)

This should be safe because we've been warning for this. The LinkedStateMixin is technically exposed on React.addons without a warning but presumably you wouldn't be using it without a valueLink or checkedLink.

I do this primarily to clear up what the custom onChange listeners are doing.

Renamed the final prop type helper to ReactControlledValuePropTypes.