Revert "add _discoverable_ keyword into ActivityPub @context"

This reverts commit 3aef4bdf8f37efd1055a84c5fca12ec4559a17f5.

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -1001,6 +1001,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
 
     locked = data["manuallyApprovesFollowers"] || false
     data = Transmogrifier.maybe_fix_user_object(data)
+    discoverable = data["discoverable"] || false
 
     user_data = %{
       ap_id: data["id"],
@@ -1009,7 +1010,8 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
         source_data: data,
         banner: banner,
         fields: fields,
-        locked: locked
+        locked: locked,
+        discoverable: discoverable
       },
       avatar: avatar,
       name: data["name"],

lib/pleroma/web/activity_pub/views/user_view.ex

@@ -106,7 +106,8 @@ defmodule Pleroma.Web.ActivityPub.UserView do
       },
       "endpoints" => endpoints,
       "attachment" => fields,
-      "tag" => (user.info.source_data["tag"] || []) ++ emoji_tags
+      "tag" => (user.info.source_data["tag"] || []) ++ emoji_tags,
+      "discoverable" => user.info.discoverable
     }
     |> Map.merge(maybe_make_image(&User.avatar_url/2, "icon", user))
     |> Map.merge(maybe_make_image(&User.banner_url/2, "image", user))

lib/pleroma/web/mastodon_api/controllers/mastodon_api_controller.ex

@@ -153,7 +153,8 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
         :hide_follows,
         :hide_favorites,
         :show_role,
-        :skip_thread_containment
+        :skip_thread_containment,
+        :discoverable
       ]
       |> Enum.reduce(%{}, fn key, acc ->
         add_if_present(acc, params, to_string(key), key, fn value ->

lib/pleroma/web/mastodon_api/views/account_view.ex

@@ -116,6 +116,8 @@ defmodule Pleroma.Web.MastodonAPI.AccountView do
     bio = HTML.filter_tags(user.bio, User.html_filter_policy(opts[:for]))
     relationship = render("relationship.json", %{user: opts[:for], target: user})
 
+    discoverable = user.info.discoverable
+
     %{
       id: to_string(user.id),
       username: username_from_nickname(user.nickname),
@@ -139,7 +141,9 @@ defmodule Pleroma.Web.MastodonAPI.AccountView do
         note: HTML.strip_tags((user.bio || "") |> String.replace("<br>", "\n")),
         sensitive: false,
         fields: raw_fields,
-        pleroma: %{}
+        pleroma: %{
+          discoverable: discoverable
+        }
       },
 
       # Pleroma extension