remove incorrect optimization branches

remove incorrect optimization branches

These assumptions were once true, but they aren't anymore, so what is
supposed to be a speed up is effectively a slowdown [not that it would
be noticible].

Usage of SingleArchFindPkg was nuked in a stable update already as the
included assumption was actually harmful btw, which is why we should get
right of other 'non-harmful' but still untrue assumptions while we can.

Git-Dch: Ignore