[unittest] Remove extra argument from IsLoadImmutable on BE

Change-Id: Ie79995eb81f2c69ad73757f74a5e4dbfb22b0481
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2784003Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Manos Koukoutos <manoskouk@chromium.org>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#73708}

test/unittests/compiler/int64-lowering-unittest.cc

@@ -228,9 +228,8 @@ TEST_F(Int64LoweringTest, Int64LoadImmutable) {
                 AllOf(CaptureEq(&high_word_load), high_word_load_matcher),
                 start(), start()));
 #elif defined(V8_TARGET_BIG_ENDIAN)
-  Matcher<Node*> high_word_load_matcher =
-      IsLoadImmutable(MachineType::Int32(), IsInt32Constant(base),
-                      IsInt32Constant(index), start(), start());
+  Matcher<Node*> high_word_load_matcher = IsLoadImmutable(
+      MachineType::Int32(), IsInt32Constant(base), IsInt32Constant(index));
 
   EXPECT_THAT(
       graph()->end()->InputAt(1),