Cleanup changelog_unreleased (#9325)

These were released in 2.1.2

changelog_unreleased/yaml/pr-9143.md

@@ -1,41 +0,0 @@
-#### Fix comment printing in mapping and sequence (#9143, #9169 by @sosukesuzuki, @fisker, fix in `yaml-unist-parser` by @ikatyang)
-
-<!-- prettier-ignore -->
-```yaml
-# Input
-- a
-  # Should indent
-- bb
-
----
-- a: a
-  b: b
-
-  # Should print one empty line before
-- another
-
-# Prettier stable
-- a
-# Should indent
-- bb
-
----
-- a: a
-  b: b
-
-
-  # Should print one empty line before
-- another
-
-# Prettier master
-- a
-  # Should indent
-- bb
-
----
-- a: a
-  b: b
-
-  # Should print one empty line before
-- another
-```