From 2a9c354b35540dfcc7dfa855a08ba0ca0c44395f Mon Sep 17 00:00:00 2001
From: Adam Turner <9087854+aa-turner@users.noreply.github.com>
Date: Mon, 24 Apr 2023 08:19:16 +0100
Subject: [PATCH 1/2] Remove is_html5_writer_available

---
 sphinx/util/docutils.py | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/sphinx/util/docutils.py b/sphinx/util/docutils.py
index b4795a0394f..cbf26fcd5d5 100644
--- a/sphinx/util/docutils.py
+++ b/sphinx/util/docutils.py
@@ -4,7 +4,6 @@
 
 import os
 import re
-import warnings
 from contextlib import contextmanager
 from copy import copy
 from os import path
@@ -371,14 +370,6 @@ def __init__(self) -> None:
         super().__init__('', 999, 4)
 
 
-def is_html5_writer_available() -> bool:
-    from sphinx.deprecation import RemovedInSphinx70Warning
-
-    warnings.warn('is_html5_writer_available() is deprecated.',
-                  RemovedInSphinx70Warning)
-    return True
-
-
 @contextmanager
 def switch_source_input(state: State, content: StringList) -> Generator[None, None, None]:
     """Switch current source input of state temporarily."""

From 7e8de6724c602688e650e6847c6e409f5dfa1003 Mon Sep 17 00:00:00 2001
From: Adam Turner <9087854+aa-turner@users.noreply.github.com>
Date: Fri, 28 Apr 2023 10:04:23 +0100
Subject: [PATCH 2/2] CHANGES

---
 CHANGES | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/CHANGES b/CHANGES
index 8365275290c..0274739413e 100644
--- a/CHANGES
+++ b/CHANGES
@@ -21,6 +21,8 @@ Incompatible changes
 * #11371: Remove deprecated ``sphinx.pycode.ast.parse()`` function.
 * #11372: Remove deprecated ``sphinx.io.read_doc()`` function.
 * #11373: Removed deprecated ``sphinx.util.get_matching_files()`` function.
+* #11378: Remove deprecated ``sphinx.util.docutils.is_html5_writer_available()``
+  function.
 
 Deprecated
 ----------