Revert a failing test from r215261

The (new) CoverageMapping/macroparams.c test is failing on a number of
buildbots. Reverting it until Alex can investigate and fix the test.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215274 91177308-0d34-0410-b5e6-96231b3b80d8