Remove dead code.

setFeatureEnabled is never called with "32" or "64". The driver never passes it
and mips' getDefaultFeatures sets the Features map directly.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188913 91177308-0d34-0410-b5e6-96231b3b80d8
ObjectiveC migrator: until we have beter understanding of
setter/getter implementations, migrate them to
nonatomic properties.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188914 91177308-0d34-0410-b5e6-96231b3b80d8