[update] move some follow internals out of shparser.h

Signed-off-by: Shahbaz Youssefi <ShabbyX@gmail.com>
[update] remove follow calculation for LR

That awkward moment when you realize follow is not even used in CLR.

Signed-off-by: Shahbaz Youssefi <ShabbyX@gmail.com>
[update] remove unused variables

Signed-off-by: Shahbaz Youssefi <ShabbyX@gmail.com>