[heap] Remove DCHECK not holding during shared heap verification

During shared heap verification, we might verify the client heap
from the shared heap's thread. In this case this DCHECK doesn't hold.
Since there is no strong need for that DCHECK simply remove it.

Bug: v8:11708, v8:13244
Change-Id: I90897915290f5238da2559538ce3cfe7ab4e9dff
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3865967Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82861}

src/heap/heap-inl.h

@@ -730,7 +730,6 @@ CodePageMemoryModificationScope::~CodePageMemoryModificationScope() {
 }
 
 IgnoreLocalGCRequests::IgnoreLocalGCRequests(Heap* heap) : heap_(heap) {
-  DCHECK_EQ(ThreadId::Current(), heap_->isolate()->thread_id());
   heap_->ignore_local_gc_requests_depth_++;
 }