⚡ Stop checking for two/threefold repetition and 50 moves draws in QSearch

[eduherminio]

As of now, QSearch only searches captures, pawn promotions and castling moves.
Only the latter could produce a 50 moves repetition, and none of them could produce a two/threefold one.

So it's pointless to check for repetition inside of QSearch.

Test  | search/no-repetition-in-qsearch
Elo   | 0.61 +- 2.93 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=32MB
LLR   | -2.29 (-2.25, 2.89) [0.00, 5.00]
Games | N: 33522 W: 10468 L: 10409 D: 12645
Penta | [1180, 3828, 6779, 3701, 1273]
https://openbench.lynx-chess.com/test/179/

> python.exe .\sprt.py -w 10468 -l 10409 -d 12645 -e0 -5 -e1 0
ELO: 0.612 +- 2.93 [-2.32, 3.54]
LLR: 5.27 [-5.0, 0.0] (-2.94, 2.94)
H1 Accepted