message: Fix tautological condition in localdce
  Summary: Fixes
diff: @@ -253,14 +253,8 @@ class LocalDce {
  if (first == b->end()) {
  return false;
  }
  - // Skip if it contains nothing but debug info.
  - for (; first != b->end(); ++first) {
  - if (first->type != MFLOW_DEBUG || first->type != MFLOW_POSITION) {
  return true;
  }
  - }
  - return false;
  - }
  void remove_block(MethodTransform* transform, Block* b) {
  if (!can_delete(b)) {
  