prod: remove domain change announcement

Author: pietroalbini

cfg.production.toml

@@ -22,7 +22,7 @@ base_url = "https://bors.rust-lang.org"
 canonical_url = "https://bors.rust-lang.org"
 remove_path_prefixes = ["homu"]
 
-announcement = "We migrated bors to a new home: <a href=\"https://bors.rust-lang.org\">bors.rust-lang.org</a>! Update your bookmarks."
+#announcement = "Hello world!"
 
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 #  Rust  #