message: Update FusedKernelMatcher pass to use upstream util to get stripped op name.
  Added this util upstream in D81435, so now using that instead and deleting the unneeded code here.
diff: @@ -52,11 +52,6 @@ struct FusedKernelMatcherPass
  void runOnFunction() override;
  };
  -// Returns an op's name with the dialect prefix stripped off.
  -StringRef GetOpNameWithoutDialect(Operation *op) {
  - return op->getName().getStringRef().split(".").second;
  -}
  -
  bool IsActivationFunction(Operation *op) {
  return isa<EluOp>(op) || isa<ReluOp>(op) || isa<Relu6Op>(op);
  }
  @@ -128,8 +123,8 @@ class FuseContractionWithBiasAdd : public OpRewritePattern<SrcOpT> {
  }
  SmallVector<Location, 3> locations{contraction.getLoc(), bias_add.getLoc()};
  - SmallVector<Attribute, 2> fused_ops{
  - StringAttr::get(GetOpNameWithoutDialect(bias_add), context)};
  + SmallVector<Attribute, 2> fused_ops{StringAttr::get(
  + bias_add.getOperation()->getName().stripDialect(), context)};
  // BiasAdd may or may not feed into an activation function.
  auto activation = GetActivation(bias_add);
  @@ -143,7 +138,7 @@ class FuseContractionWithBiasAdd : public OpRewritePattern<SrcOpT> {
  if (fuse_activation) {
  locations.push_back(activation->getLoc());
  fused_ops.push_back(
  - StringAttr::get(GetOpNameWithoutDialect(activation), context));
  + StringAttr::get(activation->getName().stripDialect(), context));
  result_type = activation->getResultTypes().front();
  } else {
  result_type = bias_add.getResult().getType();
  