iOS: Remove code trying to support compilation on the iOS 7 SDK, the deployment target has been set to iOS 8 for years and there's other unconditionally compiled code that depends on newer SDKs so that code is useless.

src/video/uikit/SDL_uikitmessagebox.m

@@ -55,7 +55,6 @@ UIKit_WaitUntilMessageBoxClosed(const SDL_MessageBoxData *messageboxdata, int *c
 static BOOL
 UIKit_ShowMessageBoxAlertController(const SDL_MessageBoxData *messageboxdata, int *buttonid)
 {
-#ifdef __IPHONE_8_0
     int i;
     int __block clickedindex = messageboxdata->numbuttons;
     const SDL_MessageBoxButtonData *buttons = messageboxdata->buttons;
@@ -125,9 +124,6 @@ UIKit_ShowMessageBoxAlertController(const SDL_MessageBoxData *messageboxdata, in
 
     *buttonid = messageboxdata->buttons[clickedindex].buttonid;
     return YES;
-#else
-    return NO;
-#endif /* __IPHONE_8_0 */
 }
 
 /* UIAlertView is deprecated in iOS 8+ in favor of UIAlertController. */

src/video/uikit/SDL_uikitmetalview.m

@@ -90,12 +90,9 @@ UIKit_Mtl_AddMetalView(SDL_Window* window)
          * dimensions of the screen rather than the dimensions in points
          * yielding high resolution on retine displays.
          */
-#ifdef __IPHONE_8_0
         if ([data.uiwindow.screen respondsToSelector:@selector(nativeScale)]) {
             scale = data.uiwindow.screen.nativeScale;
-        } else
-#endif
-        {
+        } else {
             scale = data.uiwindow.screen.scale;
         }
     }

src/video/uikit/SDL_uikitopengles.m

@@ -168,12 +168,9 @@ UIKit_GL_CreateContext(_THIS, SDL_Window * window)
             /* Set the scale to the natural scale factor of the screen - the
              * backing dimensions of the OpenGL view will match the pixel
              * dimensions of the screen rather than the dimensions in points. */
-#ifdef __IPHONE_8_0
             if ([data.uiwindow.screen respondsToSelector:@selector(nativeScale)]) {
                 scale = data.uiwindow.screen.nativeScale;
-            } else
-#endif
-            {
+            } else {
                 scale = data.uiwindow.screen.scale;
             }
         }

src/video/uikit/SDL_uikitwindow.m

@@ -77,7 +77,8 @@
 @end
 
 
-static int SetupWindowData(_THIS, SDL_Window *window, UIWindow *uiwindow, SDL_bool created)
+static int
+SetupWindowData(_THIS, SDL_Window *window, UIWindow *uiwindow, SDL_bool created)
 {
     SDL_VideoDisplay *display = SDL_GetDisplayForWindow(window);
     SDL_DisplayData *displaydata = (__bridge SDL_DisplayData *) display->driverdata;