Remove unused code in `AnimationPlayerEditor::_update_animation_list_icons()`
Remove unused code in `AnimationPlayerEditor::_update_animation_list_icons()`

guilhermefelipecgs/godot,guilhermefelipecgs/godot,josempans/godot,sanikoyes/godot,Zylann/godot,Valentactive/godot,akien-mga/godot,ZuBsPaCe/godot,BastiaanOlij/godot,sanikoyes/godot,vkbsb/godot,pkowal1982/godot,firefly2442/godot,sanikoyes/godot,Shockblast/godot,BastiaanOlij/godot,akien-mga/godot,Zylann/godot,josempans/godot,guilhermefelipecgs/godot,josempans/godot,guilhermefelipecgs/godot,firefly2442/godot,Zylann/godot,guilhermefelipecgs/godot,pkowal1982/godot,godotengine/godot,Zylann/godot,pkowal1982/godot,pkowal1982/godot,sanikoyes/godot,ZuBsPaCe/godot,vkbsb/godot,vkbsb/godot,godotengine/godot,Valentactive/godot,Valentactive/godot,sanikoyes/godot,ZuBsPaCe/godot,josempans/godot,Shockblast/godot,firefly2442/godot,josempans/godot,pkowal1982/godot,pkowal1982/godot,Zylann/godot,Shockblast/godot,pkowal1982/godot,firefly2442/godot,sanikoyes/godot,BastiaanOlij/godot,firefly2442/godot,ZuBsPaCe/godot,BastiaanOlij/godot,Valentactive/godot,Shockblast/godot,godotengine/godot,Valentactive/godot,Zylann/godot,godotengine/godot,sanikoyes/godot,godotengine/godot,guilhermefelipecgs/godot,akien-mga/godot,josempans/godot,vkbsb/godot,Valentactive/godot,ZuBsPaCe/godot,josempans/godot,vkbsb/godot,Shockblast/godot,firefly2442/godot,Valentactive/godot,Valentactive/godot,guilhermefelipecgs/godot,akien-mga/godot,ZuBsPaCe/godot,BastiaanOlij/godot,BastiaanOlij/godot,Shockblast/godot,Shockblast/godot,vkbsb/godot,godotengine/godot,akien-mga/godot,vkbsb/godot,akien-mga/godot,josempans/godot,guilhermefelipecgs/godot,sanikoyes/godot,akien-mga/godot,firefly2442/godot,ZuBsPaCe/godot,vkbsb/godot,firefly2442/godot,Zylann/godot,Shockblast/godot,godotengine/godot,pkowal1982/godot,godotengine/godot,Zylann/godot,akien-mga/godot,BastiaanOlij/godot,BastiaanOlij/godot,ZuBsPaCe/godot