glfilterreflectedscreen: remove unused code (copied/pasted from glfilterglass)
glfilterreflectedscreen: remove unused code (copied/pasted from glfilterglass)

ystreet/gst-plugins-gl,mapmapteam/gst-plugins-gl,ystreet/gst-plugins-gl,mapmapteam/gst-plugins-gl,ystreet/gst-plugins-gl,mapmapteam/gst-plugins-gl