fix 500 werkzeug description, add note, and remove unused import

files/routes/errors.py

@@ -1,10 +1,14 @@
 from files.helpers.wrappers import *
 from flask import *
-from werkzeug.exceptions import HTTPException
 from urllib.parse import quote, urlencode
 import time
 from files.__main__ import app, limiter
 
+# If you're adding an error, go here:
+# https://github.com/pallets/werkzeug/blob/main/src/werkzeug/exceptions.py
+# and copy the description for the error code you're adding so that the
+# default error message doesn't show up on the message. Please be exact.
+
 WERKZEUG_ERROR_DESCRIPTIONS = {
 	400: "The browser (or proxy) sent a request that this server could not understand.",
 	401: "The server could not verify that you are authorized to access the URL requested. You either supplied the wrong credentials (e.g. a bad password), or your browser doesn't understand how to supply the credentials required.",