posix-timers: Cleanup includes

Remove pointless includes and sort the remaining ones alphabetically.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/all/20250308155623.701301552@linutronix.de

Author: KAGA-KOKO

kernel/time/posix-timers.c

@@ -9,28 +9,22 @@
  *
  * These are all the functions necessary to implement POSIX clocks & timers
  */
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/slab.h>
-#include <linux/time.h>
-#include <linux/mutex.h>
-#include <linux/sched/task.h>
-
-#include <linux/uaccess.h>
-#include <linux/list.h>
-#include <linux/init.h>
+#include <linux/compat.h>
 #include <linux/compiler.h>
 #include <linux/hash.h>
+#include <linux/hashtable.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/nospec.h>
 #include <linux/posix-clock.h>
 #include <linux/posix-timers.h>
+#include <linux/sched/task.h>
+#include <linux/slab.h>
 #include <linux/syscalls.h>
-#include <linux/wait.h>
-#include <linux/workqueue.h>
-#include <linux/export.h>
-#include <linux/hashtable.h>
-#include <linux/compat.h>
-#include <linux/nospec.h>
+#include <linux/time.h>
 #include <linux/time_namespace.h>
+#include <linux/uaccess.h>
 
 #include "timekeeping.h"
 #include "posix-timers.h"