Remove some unused variables.

gui.cpp

@@ -77,7 +77,7 @@ GUI::GUI() : $game_map(GAME_MAP_X, GAME_MAP_Y),
 void GUI::create_renderer() {
   auto player = $world.get<Player>();
 
-  $map_view = Renderer([&, player] {
+  $map_view = Renderer([&] {
     System::draw_map($world, $game_map, $canvas, VIEW_PORT_X, VIEW_PORT_Y);
     return canvas($canvas);
   });

gui.hpp

@@ -38,7 +38,6 @@ class GUI {
   Map $game_map;
   sf::SoundBuffer $hit_buf;
   sf::Sound $hit_sound;
-  bool $show_paths = false;
   string $status_text = "NOT DEAD";
   Component $document;
   Component $map_view;