initrd: 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/ZO5Yx5JFogGi%[email protected]/)

Remove sentinel from kern_do_mounts_initrd_table.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Joel Granados <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

init/do_mounts_initrd.c

@@ -29,7 +29,6 @@ static struct ctl_table kern_do_mounts_initrd_table[] = {
 		.mode           = 0644,
 		.proc_handler   = proc_dointvec,
 	},
-	{ }
 };
 
 static __init int kernel_do_mounts_initrd_sysctls_init(void)