remove old server compability code

the code that was previously outcommented was outcommented for 1.11.13
compability.

we shouldn't always allow "global_variable", "global_vaiable" falls into
the "dependent" category and should only be allowed if we have a
"from_side" attribute.

src/server/game.cpp

@@ -839,7 +839,7 @@ bool game::is_legal_command(const simple_wml::node& command, bool is_player) {
 	if (!command.one_child()) return false;
 	// Chatting is never an illegal command.
 	if (command.child("speak")) return true;
-	if (is_player && command.has_attr("dependent") /*&& command.has_attr("from_side")*/)
+	if (is_player && command.has_attr("dependent") && command.has_attr("from_side"))
 		//AKA it's generated by get_user_input for example [global_variable]
 	{
 		return true;
@@ -849,7 +849,6 @@ bool game::is_legal_command(const simple_wml::node& command, bool is_player) {
 		|| command.child("clear_labels")
 		|| command.child("rename")
 		|| command.child("countdown_update")
-		|| command.child("global_variable")
 		))
 	{
 		return true;