config/arm: remove unused or superfluous variables
config/arm: remove unused or superfluous variables

Remove variables that were either not used, referenced just once or not
needed.

Signed-off-by: Juraj Linkeš <cc98fdfd74a97bdc42df592c19d962e48c451a95@pantheon.tech>
Reviewed-by: Ruifeng Wang <a548d51fbc42485a8ba807711a537e88c2b59dd2@arm.com>
Reviewed-by: Honnappa Nagarahalli <01ccf438b971cc1d8919c8a7f18443cae9429d8b@arm.com>
Acked-by: Jerin Jacob <352c4d4f9291b869992ddb67daa45ddc149fed30@marvell.com>
Tested-by: Jerin Jacob <352c4d4f9291b869992ddb67daa45ddc149fed30@marvell.com>
Tested-by: Pavan Nikhilesh <8184a94f8f7778086ea0697cdb513b2e42813b09@marvell.com>
Tested-by: Vimal Chungath <e8687fb522c232c5eb43afd0d27010105e643195@amazon.com>
Tested-by: Dharmik Thakkar <724f3610823e4b14afc73144686337ac966281c2@arm.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk