1 files changed, 3 insertions, 12 deletions
diff --git a/sphinx/ext/doctest.py b/sphinx/ext/doctest.py
index 26966016d..48ebcd34e 100644
--- a/sphinx/ext/doctest.py
+++ b/sphinx/ext/doctest.py
@@ -13,10 +13,10 @@ import doctest
 import re
 import sys
 import time
-import warnings
 from io import StringIO
 from os import path
-from typing import Any, Callable, Dict, Iterable, List, Sequence, Set, Tuple
+from typing import Any, Callable, Dict, Iterable, List, Sequence, Set, Tuple, Type
+from typing import TYPE_CHECKING
 
 from docutils import nodes
 from docutils.nodes import Element, Node, TextElement
@@ -26,16 +26,13 @@ from packaging.version import Version
 
 import sphinx
 from sphinx.builders import Builder
-from sphinx.deprecation import RemovedInSphinx40Warning
 from sphinx.locale import __
 from sphinx.util import logging
 from sphinx.util.console import bold  # type: ignore
 from sphinx.util.docutils import SphinxDirective
 from sphinx.util.osutil import relpath
 
-if False:
-    # For type annotation
-    from typing import Type  # for python3.5.1
+if TYPE_CHECKING:
     from sphinx.application import Sphinx
 
 
@@ -45,12 +42,6 @@ blankline_re = re.compile(r'^\s*<BLANKLINE>', re.MULTILINE)
 doctestopt_re = re.compile(r'#\s*doctest:.+$', re.MULTILINE)
 
 
-def doctest_encode(text: str, encoding: str) -> str:
-    warnings.warn('doctest_encode() is deprecated.',
-                  RemovedInSphinx40Warning, stacklevel=2)
-    return text
-
-
 def is_allowed_version(spec: str, version: str) -> bool:
     """Check `spec` satisfies `version` or not.