clients: Remove unused client-side resize tracking code
clients: Remove unused client-side resize tracking code

eyolfson/weston,udoprog/weston,krezovic/weston,xorgy/weston,Gnurou/weston,xorgy/weston,Tarnyko/weston-xdg_surface_present,Tarnyko/weston-xdg_surface_present,mchalupa/weston,Fantu/compositor-spice,giucam/weston,krezovic/weston,jonnylamb/weston,sir-murray/weston,Fantu/compositor-spice,kwm81/weston,sir-murray/weston,giucam/weston,udoprog/weston,eyolfson/weston,Fantu/compositor-spice,jonnylamb/weston,Gnurou/weston,kwm81/weston,mchalupa/weston