[heap] Remove CS expectation from test

TEST=cctest/test-heap/EnsureAllocationSiteDependentCodesProcessed

Bug: 
Change-Id: I803d6b33258175da32fa79ba9b839e67d5ba11bf
Reviewed-on: https://chromium-review.googlesource.com/643210Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47721}

test/cctest/heap/test-heap.cc

@@ -3663,10 +3663,8 @@ TEST(EnsureAllocationSiteDependentCodesProcessed) {
       dependency = dependency->next_link();
       dependency_group_count++;
     }
-
-    // TurboFan respects pretenuring feedback from allocation sites, Crankshaft
-    // does not. Either is fine for the purposes of this test.
-    CHECK(dependency_group_count == 1 || dependency_group_count == 2);
+    // Expect a dependent code object for transitioning and pretenuring.
+    CHECK_EQ(2, dependency_group_count);
   }
 
   // Now make sure that a gc should get rid of the function, even though we