Remove setfenv & getfenv (#148)

Closed old PR because I messed up and forgot to switch to main before
making another branch

Closes issue #145

Author: ffrostfall

cli/main.cpp

@@ -79,6 +79,12 @@ lua_State* setupState(Runtime& runtime)
     luaL_register(L, "_G", funcs);
     lua_pop(L, 1);
 
+    lua_pushnil(L);
+    lua_setglobal(L, "setfenv");
+    
+    lua_pushnil(L);
+    lua_setglobal(L, "getfenv");
+    
     luaL_sandbox(L);
 
     return L;