Yeet psqt weights
Simplifying the ratio in the eval between the psqt and the positional eval to a basic addition
Passed Nonreg STC:
https://tests.stockfishchess.org/tests/view/6a3eaac63036e45021aeb937
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 207392 W: 53521 L: 53489 D: 100382
Ptnml(0-2): 585, 24412, 53748, 24288, 663
Passed Nonreg LTC:
https://tests.stockfishchess.org/tests/view/6a423666f97ff95f7879508e
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 27198 W: 7200 L: 6989 D: 13009
Ptnml(0-2): 12, 2794, 7779, 2999, 15
closes https://github.com/official-stockfish/Stockfish/pull/6934
Bench: 2067208