message: Remove unused UnrankedTensorTypeKeyInfo.
diff: @@ -78,22 +78,6 @@ struct RankedTensorTypeKeyInfo : DenseMapInfo<RankedTensorType*> {
  return lhs == KeyTy(rhs->getElementType(), rhs->getShape());
  }
  };
  -struct UnrankedTensorTypeKeyInfo : DenseMapInfo<UnrankedTensorType*> {
  - // Ranked tensors are uniqued based on their element type and shape.
  - using KeyTy = Type*;
  - using DenseMapInfo<UnrankedTensorType*>::getHashValue;
  - using DenseMapInfo<UnrankedTensorType*>::isEqual;
  -
  - static unsigned getHashValue(KeyTy key) {
  - return hash_combine(DenseMapInfo<Type*>::getHashValue(key));
  - }
  -
  - static bool isEqual(const KeyTy &lhs, const UnrankedTensorType *rhs) {
  - if (rhs == getEmptyKey() || rhs == getTombstoneKey())
  - return false;
  - return lhs == rhs->getElementType();
  - }
  -};
  } // end anonymous namespace.
  