binder: remove redundant variable page_addr

Variable page_addr is being assigned a value that is never read. The
variable is redundant and can be removed.

Cleans up clang scan build warning:
warning: Value stored to 'page_addr' is never read [deadcode.DeadStores]

Signed-off-by: Colin Ian King <colin.i.king@intel.com>
Fixes: 162c797 ("binder: avoid user addresses in debug logs")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202312060851.cudv98wG-lkp@intel.com/
Acked-by: Carlos Llamas <cmllamas@google.com>
Link: https://lore.kernel.org/r/20240307221505.101431-1-cmllamas@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Colin Ian King

drivers/android/binder_alloc.c

@@ -925,15 +925,13 @@ void binder_alloc_deferred_release(struct binder_alloc *alloc)
 		int i;
 
 		for (i = 0; i < alloc->buffer_size / PAGE_SIZE; i++) {
-			unsigned long page_addr;
 			bool on_lru;
 
 			if (!alloc->pages[i].page_ptr)
 				continue;
 
 			on_lru = list_lru_del_obj(&binder_freelist,
 						  &alloc->pages[i].lru);
-			page_addr = alloc->buffer + i * PAGE_SIZE;
 			binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
 				     "%s: %d: page %d %s\n",
 				     __func__, alloc->pid, i,