lsm: remove the now superfluous sentinel element from ctl_table array

lsm: 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 the sentinel from all files under security/ that register a
sysctl table.

Signed-off-by: Joel Granados <[email protected]>
Acked-by: Kees Cook <[email protected]> # loadpin & yama
Tested-by: Valentin Schneider <[email protected]>
Reviewed-by: Valentin Schneider <[email protected]>
[PM: subject line tweaks]
Signed-off-by: Paul Moore <[email protected]>