Remove some unnecessary draw calls when recruiting or recalling

I think these were probably there to deal with the GUI1 menus needed to be undrawn under the GUI1 Recruit/Recall
dialogs (dunno if the problem persisted into GUI2). Either way, they're not necessary now, since GUI2 handled the
dialog undrawing.

src/menu_events.cpp

@@ -263,8 +263,6 @@ void menu_handler::recruit(int side_num, const map_location& last_hex)
 {
 	std::vector<const unit_type*> sample_units;
 
-	gui_->draw(); // clear the old menu
-
 	std::set<std::string> recruits = actions::get_recruits(side_num, last_hex);
 
 	for(const auto& recruit : recruits) {
@@ -365,8 +363,6 @@ void menu_handler::recall(int side_num, const map_location& last_hex)
 		recall_list_team = actions::get_recalls(side_num, last_hex);
 	}
 
-	gui_->draw(); // clear the old menu
-
 	DBG_WB << "menu_handler::recall: Contents of wb-modified recall list:\n";
 	for(const unit_const_ptr& unit : recall_list_team) {
 		DBG_WB << unit->name() << " [" << unit->id() << "]\n";