Revert all smartmatch support

This reverts commit 7b193db9c6d2467e9251ed729097cf73c30153e1.
This reverts commit 670731828730d47fc132d41667f88c3a7fe7f3ef.
This reverts commit 92ac9118379106d28d16ddc86d11ae252ee34a86.
update Changes file + version numbers for cpan release