Remove a useless cast to (void *) in hash_search() call

This pattern was previously cleaned up in 54a177a948, but a new
instance snuck in around the same time in 31966b151e.

src/backend/storage/buffer/localbuf.c

@@ -379,7 +379,7 @@ ExtendBufferedRelLocal(BufferManagerRelation bmr,
 		InitBufferTag(&tag, &bmr.smgr->smgr_rlocator.locator, fork, first_block + i);
 
 		hresult = (LocalBufferLookupEnt *)
-			hash_search(LocalBufHash, (void *) &tag, HASH_ENTER, &found);
+			hash_search(LocalBufHash, &tag, HASH_ENTER, &found);
 		if (found)
 		{
 			BufferDesc *existing_hdr;