frontend: Disable GUI

The GUI will not be necessary for the foreseeable future. Focus will be
on implementing the virtual machine. And this commit speeds up the compile time
as well.

Signed-off-by: Ronald Caesar <github43132@proton.me>

src/main.cpp

@@ -18,6 +18,7 @@
 
 int main()
 {
+#if 0
     gui::window_t window = {.data = nullptr, .gl_context = nullptr};
     (void)gui::window_init(&window, "Pound Emulator", 640, 480);
 
@@ -113,4 +114,5 @@ int main()
     }
 
     gui::destroy();
+#endif
 }