Remove template W param
Different W template parameters for the different statEntries are
not needed, simplify by consistently using 32.
Passed STC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 21683 W: 4545 L: 4424 D: 12714
http://tests.stockfishchess.org/tests/view/5ad797550ebc595700526e59
Passed LTC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 110391 W: 16551 L: 16562 D: 77278
http://tests.stockfishchess.org/tests/view/5ad7a88f0ebc595700526e61
Closes https://github.com/official-stockfish/Stockfish/pull/1557
Bench: 5120532