Revert "Bonus for knight when several backward pawn"

This reverts commit f4f54cc791be72a67a9c84585fc22114b78989bf.
Revert "Bonus for knight when several backward pawn"

This reverts commit 114af3bf3cb5c474ba06ae962dbd49405dcb0d37.
Revert "Bonus for knight when several backward pawn"

This reverts commit 31bbab91ceb04fc540deeef69abf642831b726b1.