lib: remove lib/nodemask.c

Commit 36d4b36b6959 ("lib/nodemask: inline next_node_in() and
node_random()") removed the lib/nodemask.c file, but the remove didn't
happen when the patch was applied.

Reported-by: "Aneesh Kumar K.V" <[e-mail]>
Signed-off-by: Yury Norov <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

lib/nodemask.c

···
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/nodemask.h>
-#include <linux/module.h>
-#include <linux/random.h>
-
-EXPORT_SYMBOL(__next_node_in);
-
-#ifdef CONFIG_NUMA
-/*
- * Return the bit number of a random bit set in the nodemask.
- * (returns NUMA_NO_NODE if nodemask is empty)
- */
-int node_random(const nodemask_t *maskp)
-{
-	int w, bit = NUMA_NO_NODE;
-
-	w = nodes_weight(*maskp);
-	if (w)
-		bit = bitmap_ord_to_pos(maskp->bits,
-			get_random_int() % w, MAX_NUMNODES);
-	return bit;
-}
-#endif