Revert "use silent as typing literal, resolve modmail-dev#3179"

This reverts commit f6395aa.

Author: Erisa

cogs/modmail.py

@@ -2,7 +2,7 @@
 import re
 from datetime import datetime
 from itertools import zip_longest
-from typing import Optional, Union, List, Tuple, Literal
+from typing import Optional, Union
 from types import SimpleNamespace
 
 import discord
@@ -1344,11 +1344,9 @@ async def selfcontact(self, ctx):
     async def contact(
         self,
         ctx,
-        users: commands.Greedy[
-            Union[Literal["silent", "silently"], discord.Member, discord.User, discord.Role]
-        ],
+        users: commands.Greedy[Union[discord.Member, discord.User, discord.Role]],
         *,
-        category: SimilarCategoryConverter = None,
+        category: Union[SimilarCategoryConverter, str] = None,
         manual_trigger=True,
     ):
         """
@@ -1362,22 +1360,16 @@ async def contact(
         A maximum of 5 users are allowed.
         `options` can be `silent` or `silently`.
         """
-        silent = any(x in users for x in ("silent", "silently"))
-        if silent:
-            try:
-                users.remove("silent")
-            except ValueError:
-                pass
-
-            try:
-                users.remove("silently")
-            except ValueError:
-                pass
-
-        print(users, silent)
+        silent = False
         if isinstance(category, str):
             category = category.split()
 
+            # just check the last element in the list
+            if category[-1].lower() in ("silent", "silently"):
+                silent = True
+                # remove the last element as we no longer need it
+                category.pop()
+
             category = " ".join(category)
             if category:
                 try: