sched: remove task_struct->faults_disabled_mapping

This reverts commit 2b69987be575 ("sched: Add
task_struct->faults_disabled_mapping"), which added this field without
review or maintainer signoff. With bcachefs removed from the
tree it is also unused now.

Signed-off-by: Christoph Hellwig <[e-mail]>
Signed-off-by: Peter Zijlstra (Intel) <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

include/linux/sched.h

···
 
 	struct mm_struct		*mm;
 	struct mm_struct		*active_mm;
-	struct address_space		*faults_disabled_mapping;
 
 	int				exit_state;
 	int				exit_code;

init/init_task.c

···
 	.nr_cpus_allowed= NR_CPUS,
 	.mm		= NULL,
 	.active_mm	= &init_mm,
-	.faults_disabled_mapping = NULL,
 	.restart_block	= {
 		.fn = do_no_restart_syscall,
 	},