Remove try/except + test

Changes in d064ff5 made try/except unnecessary and the subsequent test failed.

src/paperless_mail/mail.py

@@ -92,18 +92,13 @@ class TagMailAction(BaseMailAction):
 
         # The custom tag should look like "apple:<color>"
         if "apple:" in parameter.lower():
-            try:
+
             _, self.color = parameter.split(":")
             self.color = self.color.strip()
 
             if not self.color.lower() in APPLE_MAIL_TAG_COLORS.keys():
                 raise MailError("Not a valid AppleMail tag color.")
-            except Exception as e:
+
-                raise MailError(
-                    """Could not parse parameters.
-                    Make sure they look like this: apple:<color> and
-                    only use allowed colors.""",
-                ) from e
             self.keyword = None
 
         else:

src/paperless_mail/tests/test_mail.py

@@ -682,11 +682,6 @@ class TestMail(DirectoriesMixin, TestCase):
             TagMailAction,
             "apple:black",
         )
-        self.assertRaises(
-            MailError,
-            TagMailAction,
-            "applegreen",
-        )
 
     def test_handle_mail_account_tag_applemail(self):
         # all mails will be FLAGGED afterwards