mufs: set proper file size in remove_page()

source/fs/mufs/path.c

@@ -85,7 +85,7 @@ static int remove_page(struct mufs_tree *tree, uint32_t va)
 		mufs_map_page(tree, va, page);
 	}
 
-	tree->file_size -= (UINT32_C(1) << dev->log2_block_size);
+	tree->file_size = last_va;
 
 	return mufs_sync_tree(tree);
 }