Revert "engine: platform: magx: add pre-init platform-specific hook"

This reverts commit 2958b14cc2.

engine/platform/magx/sys_magx.cpp

@@ -1,25 +0,0 @@
-/*
-sys_magx.cpp - MotoMAGX system utils
-Copyright (C) 2019 a1batross
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-*/
-#include "platform/platform.h"
-#include <ZApplication.h>
-
-typedef void (*pfnChangeGame)( const char *progname );
-extern "C" int EXPORT Host_Main( int argc, char **argv, const char *progname, int bChangeGame, pfnChangeGame func );
-
-extern "C" int EXPORT Platform_Main( int argc, char **argv, const char *progname, int bChangeGame, pfnChangeGame func )
-{
-	ZApplication app( argc, argv );
-	return Host_Main( argc, argv, progname, bChangeGame, func );
-}