[owtf] Remove unused core parameter.
[owtf] Remove unused core parameter.

DarKnight--/owtf,DePierre/owtf,owtf/owtf,owtf/owtf,sharad1126/owtf,DarKnight24/owtf,owtf/owtf,owtf/owtf,owtf/owtf,DarKnight--/owtf,DarKnight24/owtf,DePierre/owtf,DePierre/owtf,DarKnight24/owtf,DarKnight--/owtf,sharad1126/owtf,sharad1126/owtf,DePierre/owtf,DarKnight24/owtf,DarKnight--/owtf,sharad1126/owtf