cachefiles: Remove the now superfluous sentinel element from ctl_table array

This commit comes at the tail end of a greater effort to remove the empty
elements at the end of the ctl_table arrays (sentinels) which will reduce the
overall build time size of the kernel and run time memory bloat by ~64 bytes
per sentinel (further information Link :
https://lore.kernel.org/all/[e-mail]/)

Remove sentinel from cachefiles_sysctls

Signed-off-by: Joel Granados <[e-mail]>
Acked-by: Christian Brauner <[e-mail]>
Signed-off-by: Luis Chamberlain <[e-mail]>

fs/cachefiles/error_inject.c

···
 		.mode		= 0644,
 		.proc_handler	= proc_douintvec,
 	},
-	{}
 };
 
 int __init cachefiles_register_error_injection(void)