remove dead code from Pry::Config#initialize.
remove dead code from Pry::Config#initialize.

geoffreylitt/pry,ooohiroyukiooo/pry,85x14/pry,bronzdoc/pry,ooohiroyukiooo/pry,nju520/pry,caporta/pry,printercu/pry,gfvcastro/pry,geoffreylitt/pry,shockone/pry,icebreaker/pry,sideci-sample/sideci-sample-pry,jasonm23/pry,jasonm23/pry,raeno/pry,pvdb/pry,scalixte-mdsol/pry,nju520/pry,85x14/pry,bronzdoc/pry,sferik/pry,tdg5/pry,shockone/pry,josue804/debunker,pvdb/pry,tdg5/pry,ngpestelos/pry,sferik/pry,nju520/pry,raeno/pry,raeno/pry,ooohiroyukiooo/pry,gfvcastro/pry,scalixte-mdsol/pry,josue804/debunker,jasnow/pry,ngpestelos/pry,caporta/pry,85x14/pry,tdg5/pry,scalixte-mdsol/pry,jasnow/pry,jasonm23/pry,printercu/pry,jasnow/pry,caporta/pry,icebreaker/pry,shockone/pry