Remove all tags from guest accounts

Especially the 'alchemist' tag.

typeclasses/characters.py

@@ -110,11 +110,9 @@ class Character(Object, GenderCharacter, ContribRPCharacter):
         What if there is a bug and they are able to "get" something
         important, instead of berries?
         """
-        # Remove all the `hidden` tags, which resets all previously
-        # seen objects:
+        # Remove all the tags, which resets all previously seen objects:
         for tag in self.tags.all():
-            if tag.startswith("hidden_"):
-                self.tags.remove(tag)
+            self.tags.remove(tag)
 
         # Remove everything in their inventory...including letter/ticket
         for obj in self.contents:

world/test-run.exp

@@ -1024,6 +1024,9 @@ expectit "You hear a click"
 send "down stairs\n"
 expectit "Secret Room"
 
+send "empty\n"
+expectit "empty"
+
 send "add mushroom\n"
 expectit "You add gigglecap mushroom to black cauldron."