Remove unused Board.pieceAt function
Remove unused Board.pieceAt function

luanlv/lila,JimmyMow/lila,terokinnunen/lila,pawank/lila,abougouffa/lila,danilovsergey/i-bur,r0k3/lila,clarkerubber/lila,Unihedro/lila,Enigmahack/lila,bjhaid/lila,elioair/lila,Happy0/lila,arex1337/lila,arex1337/lila,pawank/lila,TangentialAlan/lila,elioair/lila,clarkerubber/lila,abougouffa/lila,clarkerubber/lila,systemovich/lila,elioair/lila,JimmyMow/lila,ccampo133/lila,clarkerubber/lila,danilovsergey/i-bur,r0k3/lila,terokinnunen/lila,TangentialAlan/lila,Enigmahack/lila,Unihedro/lila,pavelo65/lila,Enigmahack/lila,systemovich/lila,TangentialAlan/lila,TangentialAlan/lila,terokinnunen/lila,bjhaid/lila,abougouffa/lila,danilovsergey/i-bur,pawank/lila,abougouffa/lila,Enigmahack/lila,arex1337/lila,systemovich/lila,pawank/lila,Enigmahack/lila,terokinnunen/lila,clarkerubber/lila,ccampo133/lila,Happy0/lila,arex1337/lila,arex1337/lila,Happy0/lila,Unihedro/lila,JimmyMow/lila,luanlv/lila,JimmyMow/lila,systemovich/lila,Unihedro/lila,systemovich/lila,ccampo133/lila,luanlv/lila,pawank/lila,samuel-soubeyran/lila,pavelo65/lila,TangentialAlan/lila,systemovich/lila,r0k3/lila,bjhaid/lila,pavelo65/lila,JimmyMow/lila,terokinnunen/lila,pavelo65/lila,samuel-soubeyran/lila,arex1337/lila,elioair/lila,luanlv/lila,Unihedro/lila,luanlv/lila,bjhaid/lila,pavelo65/lila,r0k3/lila,pawank/lila,abougouffa/lila,clarkerubber/lila,ccampo133/lila,JimmyMow/lila,Enigmahack/lila,terokinnunen/lila,TangentialAlan/lila,Happy0/lila,danilovsergey/i-bur,danilovsergey/i-bur,luanlv/lila,bjhaid/lila,JimmyMow/lila,danilovsergey/i-bur,TangentialAlan/lila,systemovich/lila,clarkerubber/lila,samuel-soubeyran/lila,r0k3/lila,pavelo65/lila,elioair/lila,bjhaid/lila,r0k3/lila,samuel-soubeyran/lila,r0k3/lila,ccampo133/lila,ccampo133/lila,terokinnunen/lila,samuel-soubeyran/lila,danilovsergey/i-bur,bjhaid/lila,abougouffa/lila,elioair/lila,ccampo133/lila,arex1337/lila,pavelo65/lila,Unihedro/lila,Unihedro/lila,samuel-soubeyran/lila,elioair/lila,Happy0/lila,Enigmahack/lila,samuel-soubeyran/lila,abougouffa/lila,Happy0/lila,Happy0/lila,luanlv/lila,pawank/lila