Revert "simplify pawn structure evaluation"

ELO: -3.65 +-3.6 (95%) LOS: 2.2%
Total: 16000 W: 3412 L: 3580 D: 9008

This reverts commit c7012ec15a3bddca2f34b0d969f8cc4083e519bd.
remove doubled pawns penalty
bench 4226019
Skip a redundant check

Spotted by Joona

No functional change.
Merge branch 'master' into simplify_eval
bench 4226019