Remove the unused completely_redrawn event

No observers attached themselves to this event. Commit ea257355 removed some
code that should have been triggered by the event, but which now (since
ea257355) uses the "theme_reset" event or update_enabled_buttons() instead.

src/display.cpp

@@ -193,7 +193,6 @@ display::display(const display_context * dc, std::weak_ptr<wb::manager> wb, repo
 	map_labels_(new map_labels(nullptr)),
 	reports_object_(&reports_object),
 	scroll_event_("scrolled"),
-	complete_redraw_event_("completely_redrawn"),
 	frametimes_(50),
 	fps_counter_(),
 	fps_start_(),
@@ -2463,8 +2462,6 @@ void display::redraw_everything()
 	draw(true,true);
 	int ticks3 = SDL_GetTicks();
 	LOG_DP << "invalidate and draw: " << (ticks3 - ticks2) << " and " << (ticks2 - ticks1) << "\n";
-
-	complete_redraw_event_.notify_observers();
 }
 
 void display::add_redraw_observer(std::function<void(display&)> f)

src/display.hpp

@@ -562,8 +562,6 @@ public:
 	/** Expose the event, so observers can be notified about map scrolling. */
 	events::generic_event &scroll_event() const { return scroll_event_; }
 
-	events::generic_event& complete_redraw_event() { return complete_redraw_event_; }
-
 	/** Check if a tile is fully visible on screen. */
 	bool tile_fully_on_screen(const map_location& loc) const;
 
@@ -772,12 +770,6 @@ protected:
 	/** Event raised when the map is being scrolled */
 	mutable events::generic_event scroll_event_;
 
-	/**
-	 * notify observers that the screen has been redrawn completely
-	 * atm this is used for replay_controller to add replay controls to the standard theme
-	 */
-	events::generic_event complete_redraw_event_;
-
 	boost::circular_buffer<unsigned> frametimes_; // in milliseconds
 	unsigned int fps_counter_;
 	std::chrono::seconds fps_start_;