added O3 and removed include

Main.cpp

@@ -1,6 +1,5 @@
 #include <iostream>
 #include <cstring>
-#include <fstream>
 
 #include "rendering/GLFW.h"
 #include "rendering/Window.h"

meson.build

@@ -8,7 +8,7 @@ glfwDep = dependency('glfw3')
 executable('game_client', 
     sources: sources,
     dependencies : [glewDep, glfwDep],
-    cpp_args: ['-Wall', '-Wextra', '-pedantic', '-Werror'])
+    cpp_args: ['-Wall', '-Wextra', '-pedantic', '-Werror', '-O3'])