Remove the check from the roots test that doesn't add value

Bug: v8:8238
Change-Id: I0883e36ddbacb3e6f222e33f5e4604b31723872f
Reviewed-on: https://chromium-review.googlesource.com/c/1270919Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56487}

test/cctest/test-roots.cc

@@ -27,12 +27,6 @@ AllocationSpace GetSpaceFromObject(Object* object) {
 TEST(TestReadOnlyRoots) {
   ReadOnlyRoots roots(CcTest::i_isolate());
 
-  STATIC_ASSERT(static_cast<int>(RootIndex::kFirstReadOnlyRoot) == 0);
-#ifdef V8_INTL_SUPPORT
-  CHECK_EQ(static_cast<int>(RootIndex::kReadOnlyRootsCount), 501);
-#else
-  CHECK_EQ(static_cast<int>(RootIndex::kReadOnlyRootsCount), 456);
-#endif
   READ_ONLY_ROOT_LIST(CHECK_IN_RO_SPACE)
 }