Remove ObjC support functions not needed on non-ObjC platforms#213

MadCoder merged 1 commit intoswiftlang:masterswiftlang/swift-corelibs-libdispatch:masterfrom

spevans:pr_unneeded_objcspevans/swift-corelibs-libdispatch:pr_unneeded_objcCopy head branch name to clipboard