Remove the hack where we sniff the __IPHONE_OS_VERSION_MIN_REQUIRED define.

We can use -mios-simulator-version-min now. rdar://10218700

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@142311 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed