Merge branch 'remove/mastofe' into 'develop'

Remove MastoFE from Pleroma, fixes #2625

Closes #2625

See merge request pleroma/pleroma!3392

priv/repo/migrations/20210416051708_remove_mastofe_settings_from_users.exs

@@ -0,0 +1,9 @@
+defmodule Pleroma.Repo.Migrations.RemoveMastofeSettingsFromUsers do
+  use Ecto.Migration
+
+  def change do
+    alter table(:users) do
+      remove_if_exists(:mastofe_settings, :map)
+    end
+  end
+end