Revert "mi: Shortcut miDoCopy/miCopyArea based on clipList"

This reverts commit f665a9c9.

Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Acked-by: Martin Peres <martin.peres@mupuf.org>
Closes: xorg/xserver#1108
Closes: xorg/xserver#1128
4 jobs for revert-window-unmap-and-mi-blit in 6 minutes and 36 seconds (queued for 1 second)