doc: Remove dead plugin

Whatever extra functionality the 'nova.ext.nova_todo' plugin provided
over the stock 'sphinx.ext.todo' extension, we're no longer using it and
it prevents us from using the stock one. Remove it and enable the stock
one instead.

Change-Id: I57fde86bf77dad87bb4d41ef8ad19f933f5c1260

1 files changed, 0 insertions, 113 deletions

diff --git a/doc/ext/nova_todo.py b/doc/ext/nova_todo.py
deleted file mode 100644
index eb5335cb20..0000000000
--- a/doc/ext/nova_todo.py
+++ /dev/null
@@ -1,113 +0,0 @@
-# This is a hack of the builtin todo extension, to make the todo_list
-# more user friendly.
-
-import re
-
-from sphinx.ext.todo import depart_todo_node
-from sphinx.ext.todo import NoUri
-from sphinx.ext.todo import nodes
-from sphinx.ext.todo import process_todos
-from sphinx.ext.todo import purge_todos
-from sphinx.ext.todo import Todo
-from sphinx.ext.todo import TodoList
-from sphinx.ext.todo import todolist
-from sphinx.ext.todo import todo_node
-from sphinx.ext.todo import visit_todo_node
-
-
-def _(s):
-    return s
-
-
-def process_todo_nodes(app, doctree, fromdocname):
-    if not app.config['todo_include_todos']:
-        for node in doctree.traverse(todo_node):
-            node.parent.remove(node)
-
-    # Replace all todolist nodes with a list of the collected todos.
-    # Augment each todo with a backlink to the original location.
-    env = app.builder.env
-
-    if not hasattr(env, 'todo_all_todos'):
-        env.todo_all_todos = []
-
-    # remove the item that was added in the constructor, since I'm tired of
-    # reading through docutils for the proper way to construct an empty list
-    lists = []
-    for i in range(5):
-        lists.append(nodes.bullet_list("", nodes.Text('', '')))
-        lists[i].remove(lists[i][0])
-        lists[i]['classes'].append('todo_list')
-
-    for node in doctree.traverse(todolist):
-        if not app.config['todo_include_todos']:
-            node.replace_self([])
-            continue
-
-        for todo_info in env.todo_all_todos:
-            para = nodes.paragraph()
-            # Create a reference
-            newnode = nodes.reference('', '')
-
-            filename = env.doc2path(todo_info['docname'], base=None)
-            link = (_('%(filename)s, line %(line_info)d') %
-                     {'filename': filename, 'line_info': todo_info['lineno']})
-
-            innernode = nodes.emphasis(link, link)
-            newnode['refdocname'] = todo_info['docname']
-
-            try:
-                newnode['refuri'] = app.builder.get_relative_uri(
-                    fromdocname, todo_info['docname'])
-                newnode['refuri'] += '#' + todo_info['target']['refid']
-            except NoUri:
-                # ignore if no URI can be determined, e.g. for LaTeX output
-                pass
-
-            newnode.append(innernode)
-            para += newnode
-            para['classes'].append('todo_link')
-
-            todo_entry = todo_info['todo']
-
-            env.resolve_references(todo_entry, todo_info['docname'],
-                                   app.builder)
-
-            item = nodes.list_item('', para)
-            todo_entry[1]['classes'].append('details')
-
-            comment = todo_entry[1]
-
-            m = re.match(r"^P(\d)", comment.astext())
-            priority = 5
-            if m:
-                priority = int(m.group(1))
-                if priority < 0:
-                    priority = 1
-                if priority > 5:
-                    priority = 5
-
-            item['classes'].append('todo_p' + str(priority))
-            todo_entry['classes'].append('todo_p' + str(priority))
-
-            item.append(comment)
-
-            lists[priority - 1].insert(0, item)
-
-        node.replace_self(lists)
-
-
-def setup(app):
-    app.add_config_value('todo_include_todos', False, False)
-
-    app.add_node(todolist)
-    app.add_node(todo_node,
-                 html=(visit_todo_node, depart_todo_node),
-                 latex=(visit_todo_node, depart_todo_node),
-                 text=(visit_todo_node, depart_todo_node))
-
-    app.add_directive('todo', Todo)
-    app.add_directive('todolist', TodoList)
-    app.connect('doctree-read', process_todos)
-    app.connect('doctree-resolved', process_todo_nodes)
-    app.connect('env-purge-doc', purge_todos)