Csgo added grenade prediction into the client so no need for drawing that anymore
here is a source from Osiris:
Code:
void Misc::nadePredict() noexcept {
	auto nadeVar = interfaces.cvar->findVar("cl_grenadepreview");
	nadeVar->onChangeCallbacks.size = 0;
	nadeVar->setValue(config.misc.nadePredict ? 1 : 0);
}
Happy copypasta