remove bonuslevel.org thanks to gamezip

Game has been converted into a proper gamezip: https://fpfss.unstable.life/web/submission/112336

Removed legacy files:

• /Legacy/cgi-bin/bonuslevel.org/guploads/getleveldata.php
• /Legacy/cgi-bin/bonuslevel.org/guploads/getlevelinfo.php
• /Legacy/cgi-bin/bonuslevel.org/guploads/getlevellist.php
• /Legacy/cgi-bin/bonuslevel.org/guploads/getrandomlevel.php
• /Legacy/cgi-bin/bonuslevel.org/guploads/getuserinfo.php
• /Legacy/cgi-bin/bonuslevel.org/guploads/initgame.php