maple_tree: remove mas_wr_modify()

There are no more users of the function, safely remove it.

Link: https://lkml.kernel.org/r/20240814161944.55347-13-sidhartha.kumar@oracle.comReviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

lib/maple_tree.c

@@ -4108,44 +4108,6 @@ static void mas_wr_bnode(struct ma_wr_state *wr_mas)
 	mas_commit_b_node(wr_mas, &b_node);
 }
 
-static inline void mas_wr_modify(struct ma_wr_state *wr_mas)
-{
-	struct ma_state *mas = wr_mas->mas;
-	unsigned char new_end;
-
-	/* Direct replacement */
-	if (wr_mas->r_min == mas->index && wr_mas->r_max == mas->last) {
-		rcu_assign_pointer(wr_mas->slots[mas->offset], wr_mas->entry);
-		if (!!wr_mas->entry ^ !!wr_mas->content)
-			mas_update_gap(mas);
-		return;
-	}
-
-	/*
-	 * new_end exceeds the size of the maple node and cannot enter the fast
-	 * path.
-	 */
-	new_end = mas_wr_new_end(wr_mas);
-	if (new_end >= mt_slots[wr_mas->type])
-		goto slow_path;
-
-	/* Attempt to append */
-	if (mas_wr_append(wr_mas, new_end))
-		return;
-
-	if (new_end == mas->end && mas_wr_slot_store(wr_mas))
-		return;
-
-	if (mas_wr_node_store(wr_mas, new_end))
-		return;
-
-	if (mas_is_err(mas))
-		return;
-
-slow_path:
-	mas_wr_bnode(wr_mas);
-}
-
 /*
  * mas_wr_store_entry() - Internal call to store a value
  * @mas: The maple state