[ion/simulator] Use shutdown instead of quit

ion/src/simulator/shared/display.cpp

@@ -23,7 +23,7 @@ void init(SDL_Renderer * renderer) {
   );
 }
 
-void quit() {
+void shutdown() {
   SDL_DestroyTexture(sFramebufferTexture);
   sFramebufferTexture = nullptr;
 }

ion/src/simulator/shared/display.h

@@ -9,7 +9,7 @@ namespace Simulator {
 namespace Display {
 
 void init(SDL_Renderer * renderer);
-void quit();
+void shutdown();
 
 void draw(SDL_Renderer * renderer, SDL_Rect * rect);
 

ion/src/simulator/shared/window.cpp

@@ -122,7 +122,7 @@ void quit() {
 #if !EPSILON_SDL_SCREEN_ONLY
   Layout::quit();
 #endif
-  Display::quit();
+  Display::shutdown();
   SDL_DestroyWindow(sWindow);
   sWindow = nullptr;
   SDL_Quit();