[InstCombine] Remove a piece of a comment that said that InstCombiner contains pass infrastructure. That hasn't been true since r226618. NFC

llvm-svn: 290648

llvm/lib/Transforms/InstCombine/InstCombineInternal.h

@@ -156,8 +156,7 @@ IntrinsicIDToOverflowCheckFlavor(unsigned ID) {
 /// \brief The core instruction combiner logic.
 ///
 /// This class provides both the logic to recursively visit instructions and
-/// combine them, as well as the pass infrastructure for running this as part
-/// of the LLVM pass pipeline.
+/// combine them.
 class LLVM_LIBRARY_VISIBILITY InstCombiner
     : public InstVisitor<InstCombiner, Instruction *> {
   // FIXME: These members shouldn't be public.