Reverting "Too Few Arguments Exception" RFC

Hi all, Given this thread: http://externals.io/thread/233 I'm not happy with the state of this going into RC1 next week, and without changes (such as the patch I provided), I would like to revert this change and leave it for 7.2. My patch will _retain_ BC for internal functions with non strict_types (except for the error message, which can be reconciled), and for functions that previously threw a TypeError, ArgumentCountError is a subclass so BC is preserved there also. The issue is that the array functions that do this argument count checking themselves and still issue a warning, regardless of strict_types. We can leave the original behavior for array functions, but they then differ from other internals functions. It is a BC break for userland functions (as per the RFC), throwing an ArgumentCountError regardless of strict_types. At this point, we _must_ come to consensus by Monday to get it into RC1 (if there are changes needed) or we should remove it from 7.1. Also, I would like someone more experienced to review my patch. - Davey