Remove the code insertion hint for implicit int. Too often, we're wrong about...

Remove the code insertion hint for implicit int. Too often, we're wrong about this hint, so it loses its usefulness. Maybe some day we can make the hint smart enough to be useful.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67823 91177308-0d34-0410-b5e6-96231b3b80d8