idr_remove_all: kill unused variable

"error" is always equal to 0.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

lib/idr.c

@@ -405,7 +405,7 @@ EXPORT_SYMBOL(idr_remove);
  */
 void idr_remove_all(struct idr *idp)
 {
-	int n, id, max, error = 0;
+	int n, id, max;
 	struct idr_layer *p;
 	struct idr_layer *pa[MAX_LEVEL];
 	struct idr_layer **paa = &pa[0];
@@ -415,7 +415,7 @@ void idr_remove_all(struct idr *idp)
 	max = 1 << n;
 
 	id = 0;
-	while (id < max && !error) {
+	while (id < max) {
 		while (n > IDR_BITS && p) {
 			n -= IDR_BITS;
 			*paa++ = p;