Revert "MM-45272: Fix getPostThread permissions (#20565)" (#20811)

Automatic Merge

i18n/en.json

@@ -2233,10 +2233,6 @@
     "id": "api.post.check_for_out_of_channel_mentions.message.one",
     "translation": "@{{.Username}} did not get notified by this mention because they are not in the channel."
   },
-  {
-    "id": "api.post.compliance_enabled.join_channel_to_view_post",
-    "translation": "Due to compliance rules configured on this instance the channel must be joined before its posts can be read."
-  },
   {
     "id": "api.post.create_post.can_not_post_to_deleted.error",
     "translation": "Can not post to deleted channel."