Remove legacy changelog entries

The directory ee/changelogs/unreleased-ee was a legacy directory that we
have not supported for a long time. As per
https://gitlab.com/gitlab-com/gl-infra/delivery/-/issues/884 we are
removing this directory entirely.

ee/changelogs/unreleased-ee/aks-rename-tags-limit.yml

----
-title: Renaming TAGS_LIMIT constant to FOR_PACKAGES_TAGS_LIMIT
-merge_request: 31858
-author: Ashutosh Kumar Singh
-type: change

ee/changelogs/unreleased-ee/alert-users-of-upcoming-new-feature-flags.yml

----
-title: Alert Users that Feature Flags will be Changing
-merge_request: 32177
-author:
-type: added

ee/changelogs/unreleased-ee/alexives-7783-filter_epics_by_reaction_emoji_in_api.yml

----
-title: Add my_reaction_emoji param to epics list api
-merge_request: 31479
-author:
-type: added

ee/changelogs/unreleased-ee/conan_sources_upload_url.yml

----
-title: "Fix Conan upload URL for conan_sources.tgz"
-merge_request: 32664
-author: Zach Hilman
-type: fixed

ee/changelogs/unreleased-ee/pl-override-api.yml

----
-title: Add API methods to manipulate LDAP Override attribute
-merge_request: 28674
-author: Peter Lloyd <peter.lloyd@cambridgeconsultants.com>
-type: added

spec/lib/gitlab/danger/changelog_spec.rb

@@ -65,9 +65,7 @@ describe Gitlab::Danger::Changelog do
     context 'added files contain a changelog' do
       [
         'changelogs/unreleased/entry.yml',
-        'ee/changelogs/unreleased/entry.yml',
-        'changelogs/unreleased-ee/entry.yml',
-        'ee/changelogs/unreleased-ee/entry.yml'
+        'ee/changelogs/unreleased/entry.yml'
       ].each do |file_path|
         let(:added_files) { [file_path] }