Fix HTTPRequest status checks.

HTTPRequest used to have its own `status` variable but it would never be
updated since the status of the client would be used instead.
This caused potential crashes in some edge cases.
The `status` variable is now removed, and the client status is used in
checks instead.

scene/main/http_request.h

@@ -88,8 +88,6 @@ private:
 
 	int redirections;
 
-	HTTPClient::Status status;
-
 	bool _update_connection();
 
 	int max_redirects;