rubocop: fix various style issues.

app/logical/post_pruner.rb

@@ -5,16 +5,14 @@ class PostPruner
     prune_mod_actions!
   end
 
-protected
+  protected
 
   def prune_pending!
     CurrentUser.scoped(User.system, "127.0.0.1") do
       Post.where("is_deleted = ? and is_pending = ? and created_at < ?", false, true, 3.days.ago).each do |post|
-        begin
-          post.delete!("Unapproved in three days")
-        rescue PostFlag::Error
-          # swallow
-        end
+        post.delete!("Unapproved in three days")
+      rescue PostFlag::Error
+        # swallow
       end
     end
   end