cppgc: Remove debugging info from tests

Change-Id: I62b6ea126cd15c06fc48c8c7eae14b2b0c9b1dda
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3043962
Auto-Submit: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75845}

test/unittests/heap/cppgc/concurrent-sweeper-unittest.cc

@@ -294,14 +294,10 @@ TEST_F(ConcurrentSweeperTest, DestroyLargePageOnMainThread) {
   auto* object = MakeGarbageCollected<GCedType>(GetAllocationHandle());
   auto* page = BasePage::FromPayload(object);
 
-  fprintf(stderr, "Original page: %p\n", page);
-
   StartSweeping();
 
   // Allocating another large object should not race here.
-  auto* a = MakeGarbageCollected<GCedType>(GetAllocationHandle());
-
-  fprintf(stderr, "Other page: %p\n", BasePage::FromPayload(a));
+  MakeGarbageCollected<GCedType>(GetAllocationHandle());
 
   // Wait for concurrent sweeping to finish.
   WaitForConcurrentSweeping();