Remove the no-longer-needed F/I and D/J alias.

Rationale:
Now that our HIR is type clean (yeah!), we no longer have
to conservatively assume F/I and D/J are aliased. This
enables more accurate side effects analysis, with improvements
in all clients, such a LICM.

BUG=22538329

Change-Id: Iba1fb09ff063f31b5893f588aa6d0c5ab3b42f39
5 files changed