Clean up superfluous no-intersection return logic

It's not necessary to say 'return false' twice.

desktop_version/src/Graphics.cpp

@@ -1420,12 +1420,8 @@ bool Graphics::Hitest(SDL_Surface* surface1, point p1, SDL_Surface* surface2, po
                 }
             }
         }
-        return false;
-    }
-    else
-    {
-        return false;
     }
+    return false;
 
 }