Remove automatic fb_dtsg refreshing

This was error prone, inefficient and wouldn't handle all error cases.
The real solution is to make some way to retry the request in the
general case (since you can alway just get logged out), and that's
probably out of scope for this project, at least right now. :/

fbchat/_client.py

@@ -817,6 +817,7 @@ class Client:
         image_id = str(image_id)
         data = {"photo_id": str(image_id)}
         j = self._post("/mercury/attachments/photo/", data)
+        _util.handle_payload_error(j)
 
         url = _util.get_jsmods_require(j, 3)
         if url is None:
@@ -2017,6 +2018,7 @@ class Client:
             "https://{}-edge-chat.facebook.com/active_ping".format(self._pull_channel),
             data,
         )
+        _util.handle_payload_error(j)
 
     def _pullMessage(self):
         """Call pull api to fetch message data."""
@@ -2028,9 +2030,11 @@ class Client:
             "clientid": self._state._client_id,
             "state": "active" if self._markAlive else "offline",
         }
-        return self._get(
+        j = self._get(
             "https://{}-edge-chat.facebook.com/pull".format(self._pull_channel), data
         )
+        _util.handle_payload_error(j)
+        return j
 
     def _parseDelta(self, m):
         def getThreadIdAndThreadType(msg_metadata):