FIX: Moderators should be able to review flagged PMs since this has always been like this

app/models/reviewable.rb

@@ -133,7 +133,7 @@ class Reviewable < ActiveRecord::Base
       target: target,
       topic: topic,
       created_by: created_by,
-      reviewable_by_moderator: reviewable_by_moderator && !(topic&.private_message?),
+      reviewable_by_moderator: reviewable_by_moderator,
       payload: payload,
       potential_spam: potential_spam
     )

spec/models/reviewable_spec.rb

@@ -78,17 +78,6 @@ RSpec.describe Reviewable, type: :model do
       expect(r1.pending?).to eq(true)
       expect(r0.pending?).to eq(false)
     end
-
-    it 'sets the reviewable_by_moderator attribute to false when the topic is a PM' do
-      pm_topic = Fabricate(:private_message_topic)
-      post = Fabricate(:post, topic: pm_topic)
-      reviewable = ReviewableFlaggedPost.needs_review!(
-        target: post, topic: pm_topic,
-        created_by: Discourse.system_user, reviewable_by_moderator: true
-      )
-
-      expect(reviewable.reviewable_by_moderator).to eq(false)
-    end
   end
 
   context ".list_for" do