[Instrumentation] Remove unused include

It's also a layering violation.

llvm-svn: 335528

llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp

@@ -35,7 +35,6 @@
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Transforms/Instrumentation.h"
-#include "llvm/Transforms/Scalar.h"
 #include "llvm/Transforms/Utils/BasicBlockUtils.h"
 #include "llvm/Transforms/Utils/ModuleUtils.h"