fix(news): remove warning about changelog defaults (#2442)

As some time has already passed since we changed the defaults and there
don't seem to be any affected users, revert this change as it is no
longer relevant.

packit_service/worker/reporting/news.py

@@ -38,20 +38,7 @@ class DistgitAnnouncement:
     packit-service.
     """
 
-    __ANNOUNCEMENT = (
-        ":exclamation: **Changed default for the changelog entry generated by Packit**\n\n"
-        "We would like to bring to your attention a recent update "
-        "regarding the default changelog entry generated by Packit during release syncing. "
-        "Going forward, the default changelog entry will be generated as follows:\n"
-        "```\n- Update to version {version}\n```\nfollowed by a Bugzilla reference if there"
-        "is an open bug about a new upstream release.\n"
-        "This aligns with the Fedora Packaging Guidelines and has been agreed upon in "
-        "[this discussion](https://pagure.io/packaging-committee/issue/1339). "
-        "If you prefer a different behaviour, you can override this default in your configuration,"
-        " e.g. by using custom command(s) in `changelog-entry` action "
-        "(see [example](https://packit.dev/docs/configuration/examples"
-        "#custom-changelog-generation))."
-    )
+    __ANNOUNCEMENT = None
 
     @classmethod
     def get_announcement(cls):