Input: cs40l50 - remove redundant flush_workqueue() calls

destroy_workqueue() already drains the queue before destroying it, so
there is no need to flush it explicitly.

Remove the redundant 'flush_workqueue()' calls.

Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Link: https://lore.kernel.org/r/20250312072940.1429931-1-nichen@iscas.ac.cn
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Author: Chen Ni

drivers/input/misc/cs40l50-vibra.c

@@ -480,7 +480,6 @@ static int cs40l50_erase(struct input_dev *dev, int effect_id)
 
 static void cs40l50_remove_wq(void *data)
 {
-	flush_workqueue(data);
 	destroy_workqueue(data);
 }