Cleaned up unneeded generate_moves() parameters.
Cleaned up unneeded generate_moves() parameters.

jhlywa/chess.js,jeffthemaximum/chess.js,ornicar/chess.js,Assios/chess.js,r9k/chess.js,ornicar/chess.js,linrock/chess.js,mattyhead/chess.js,akshayverma2804/chess.js