Remove an assertion that no longer holds. <rdar://problem/16135814>

In r201528, I changed the PGO instrumentation counter for a "do" loop to not
include the fall-through count. That fall-through count is included later, b
it means that this assertion may fail for "do" loops.

llvm-svn: 202437

clang/lib/CodeGen/CodeGenPGO.h

@@ -186,7 +186,6 @@ public:
   /// within the region. The adjusted count, then, is the value of the counter
   /// at the end of the region.
   uint64_t getAdjustedCount() const {
-    assert((Adjust > 0 || (uint64_t)(-Adjust) <= Count) && "Negative count");
     return Count + Adjust;
   }