gtk-play: remove unused variables
gtk-play: remove unused variables

JimmyOhn/gst-player,amorenoc/gst-player,amorenoc/gst-player,codomania/gst-player,justinjoy/gst-player,JimmyOhn/gst-player,amorenoc/gst-player,codomania/gst-player,shakin/gst-player,sdroege/gst-player,guiseco/gst-player,justinjoy/gst-player,JimmyOhn/gst-player,jabiers/gst-player,jabiers/gst-player,sdroege/gst-player,shakin/gst-player,sdroege/gst-player,guiseco/gst-player,JimmyOhn/gst-player,codomania/gst-player,codomania/gst-player,JimmyOhn/gst-player,amorenoc/gst-player,sdroege/gst-player,shakin/gst-player,codomania/gst-player,amorenoc/gst-player,justinjoy/gst-player,jabiers/gst-player,sdroege/gst-player,guiseco/gst-player