tty/ldsem: Fix syntax errors in comments

Delete the redundant word 'are'.

Signed-off-by: Xiang wangx <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/tty/tty_ldsem.c

···
 
 	/*
 	 * Try to reverse the lock attempt but if the count has changed
-	 * so that reversing fails, check if there are are no waiters,
+	 * so that reversing fails, check if there are no waiters,
 	 * and early-out if not
 	 */
 	do {