Remove deprecated ``sphinx.util.docutils.is_html5_writer_available()`` function (#11378)

2 files changed, 2 insertions, 9 deletions

diff --git a/CHANGES b/CHANGES
index 836527529..027473941 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
 ----------
diff --git a/sphinx/util/docutils.py b/sphinx/util/docutils.py
index b4795a039..cbf26fcd5 100644
--- a/sphinx/util/docutils.py
+++ b/sphinx/util/docutils.py
@@ -4,7 +4,6 @@ from __future__ import annotations
 
 import os
 import re
-import warnings
 from contextlib import contextmanager
 from copy import copy
 from os import path
@@ -371,14 +370,6 @@ class NullReporter(Reporter):
         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."""