Doc: remove the todo plugin

Remove the sphinx todo plugin as managing a task list in the
documentation is confusing and inefficient.

Change-Id: I08912ac636c098865f187cef232cfb5f314a6d4d
Signed-off-by: Gyorgy Szing <Gyorgy.Szing@arm.com>
diff --git a/docs/project/coding-guidelines.rst b/docs/project/coding-guidelines.rst
index ca80f1b..5b5607a 100644
--- a/docs/project/coding-guidelines.rst
+++ b/docs/project/coding-guidelines.rst
@@ -69,8 +69,6 @@
    #
    #-------------------------------------------------------------------------------
 
-.. todo:: Explain CMake return values and parent scope concept in more detail.
-
 Restructured Text Rules
 -----------------------
 
diff --git a/docs/project/index.rst b/docs/project/index.rst
index d9bb409..91ad6bc 100644
--- a/docs/project/index.rst
+++ b/docs/project/index.rst
@@ -12,7 +12,7 @@
     license
     maintainers
     versioning_policy
-    todo
+
 
 --------------
 
diff --git a/docs/project/todo.rst b/docs/project/todo.rst
deleted file mode 100644
index 1739eab..0000000
--- a/docs/project/todo.rst
+++ /dev/null
@@ -1,22 +0,0 @@
-TODO list
-=========
-
-This file collects information on planned future changes and issues to be
-addressed. For managing the TODO list below, the `Sphinx TODO extension`_ is
-used.
-
-.. todo:: Find a solution to make the rendering of TODO entries less intrusive
-          at their original location.
-
-List of TODO entries in the project
------------------------------------
-
-.. todolist::
-
---------------
-
-.. _`Sphinx TODO extension`: https://www.sphinx-doc.org/en/master/usage/extensions/todo.html
-
-*Copyright (c) 2020-2021, Arm Limited and Contributors. All rights reserved.*
-
-SPDX-License-Identifier: BSD-3-Clause
\ No newline at end of file