Removed deinitVGA() from system module

src/system.c

@@ -1,4 +1,4 @@
-/** 
+/**
  * Copyright (c) 2016 rxi
  *
  * This library is free software; you can redistribute it and/or modify it
@@ -17,11 +17,6 @@ int l_system_getOS(lua_State *L) {
   return 1;
 }
 
-int l_system_deinitVGA(lua_State *L) {
-  vga_deinit();
-  return 1;
-}
-
 
 int l_system_getMemUsage(lua_State *L) {
   lua_pushnumber(L, lua_gc(L, LUA_GCCOUNT, 0) + dmt_usage() / 1024);
@@ -34,7 +29,6 @@ int luaopen_system(lua_State *L) {
   luaL_Reg reg[] = {
     { "getOS",        l_system_getOS        },
     { "getMemUsage",  l_system_getMemUsage  },
-    { "deinitVGA",    l_system_deinitVGA    },
     { 0, 0 },
   };
   luaL_newlib(L, reg);