Merge branch '22466-task-list-fork' into 'master'

Resolve "Task List Checkbox Alignment"

## What does this MR do?

Replace the unmaintained `task_list` gem with the `deckar01-task_list` fork

## Are there points in the code the reviewer needs to double check?

 - I had to pin some dependencies in the fork to support `ruby < 2.2`, which added new version restrictions for 2 existing modules.
 - I triggered a build after I removed the patch to show the test passed with the new gem, then I removed the test, because this behavior is tested in the gem's repo now.

## Why was this MR needed?

 - The `task_list` patch was added with a comment that said it should be removed when merged upstream, but the repo got archived, so an upstream patch requires a fork.
 - #22470 can't be patched without warnings due to the way `task_list` uses Ruby constants.
 - There are additional outstanding `task_list` bugs that can be fixed once we switch to a fork.

## What are the relevant issue numbers?

 - #22466 
 - #22470
 - !6487

See merge request !6625

1 files changed, 0 insertions, 22 deletions

diff --git a/lib/banzai/filter/task_list_filter.rb b/lib/banzai/filter/task_list_filter.rb
index 4efbcaf5c7f..9fa5f589f3e 100644
--- a/lib/banzai/filter/task_list_filter.rb
+++ b/lib/banzai/filter/task_list_filter.rb
@@ -2,29 +2,7 @@ require 'task_list/filter'
 
 module Banzai
   module Filter
-    # Work around a bug in the default TaskList::Filter that adds a `task-list`
-    # class to every list element, regardless of whether or not it contains a
-    # task list.
-    #
-    # This is a (hopefully) temporary fix, pending a new release of the
-    # task_list gem.
-    #
-    # See https://github.com/github/task_list/pull/60
-    module ClassNamesFilter
-      def add_css_class(node, *new_class_names)
-        if new_class_names.include?('task-list')
-          # Don't add class to all lists
-          return
-        elsif new_class_names.include?('task-list-item')
-          super(node.parent, 'task-list')
-        end
-
-        super(node, *new_class_names)
-      end
-    end
-
     class TaskListFilter < TaskList::Filter
-      prepend ClassNamesFilter
     end
   end
 end