Remove all of the random single-file deprecations

These are the changes that don't require a ton of changes to other files outside
of the original removal.

src/Scope.cc

@@ -209,12 +209,3 @@ Scope* global_scope()
 	}
 
 } // namespace zeek::detail
-
-zeek::detail::ID* lookup_ID(
-	const char* name, const char* module,
-	bool no_global,
-	bool same_module_only,
-	bool check_export)
-	{
-	return zeek::detail::lookup_ID(name, module, no_global, same_module_only, check_export).get();
-	}