fix(news): remove warning about changelog defaults

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.

Signed-off-by: Matej Focko <[email protected]>

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):