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Remove razoring changes from official-stockfish#5360
The mentioned patch introduced the usage of futility_margin into razoring alongside a tune to futility_margin. It seems the elo gained in this patch comes from the tune of futility_margin and not the introduction of futility_margin to razoring, so simplify it away here. Passed Non-regression STC: https://tests.stockfishchess.org/tests/view/66606581c340c8eed7757bc8 LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 169056 W: 43922 L: 43848 D: 81286 Ptnml(0-2): 438, 20288, 43034, 20298, 470 Passed Non-regression LTC: https://tests.stockfishchess.org/tests/view/66607764c340c8eed7757c58 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 157134 W: 39805 L: 39723 D: 77606 Ptnml(0-2): 74, 17444, 43461, 17502, 86 bench 1148120
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