Remove rootDepth condition in newDepth clamping
Passed simplification STC
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 132256 W: 34462 L: 34347 D: 63447
Ptnml(0-2): 470, 15625, 33833, 15720, 480
https://tests.stockfishchess.org/tests/view/69325fe0a24a6df719fcca16
Passed simplification LTC
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 128220 W: 32503 L: 32392 D: 63325
Ptnml(0-2): 94, 13900, 35982, 14069, 65
https://tests.stockfishchess.org/tests/view/6934c2b3a24a6df719fcdf1e
closes https://github.com/official-stockfish/Stockfish/pull/6472
Bench: 2926903