Remove outdated run lines from tests.

These run lines originally tested that the fix-its were properly applied.
Originally, the fixits were attached to warnings and were applied by -fixit.
Now, the fixits are attached to notes, so nothing happens.  These run lines
still manage to pass since Clang will produce an empty output which gets piped
back to Clang.  Then Clang produces no error on an empty input.

llvm-svn: 179131