docs: Raise the minimum Sphinx requirement to 2.4.4

Commit 31abfdda6527 (docs: Deprecate use of Sphinx < 2.4.x) in 6.2 added a
warning that support for older versions of Sphinx would be going away.
There have been no complaints, so the time has come.  Raise the minimum
Sphinx version to 2.4.4 and clean out some compatibility code that we no
longer need.

Reviewed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Link: https://lore.kernel.org/r/874jgs47fq.fsf@meer.lwn.net
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

3 files changed, 3 insertions, 17 deletions

diff --git a/Documentation/sphinx/automarkup.py b/Documentation/sphinx/automarkup.py
index acc6d55718bd..a413f8dd5115 100644
--- a/Documentation/sphinx/automarkup.py
+++ b/Documentation/sphinx/automarkup.py
@@ -7,11 +7,7 @@
 from docutils import nodes
 import sphinx
 from sphinx import addnodes
-if sphinx.version_info[0] < 2 or \
-   sphinx.version_info[0] == 2 and sphinx.version_info[1] < 1:
-    from sphinx.environment import NoUri
-else:
-    from sphinx.errors import NoUri
+from sphinx.errors import NoUri
 import re
 from itertools import chain
 
diff --git a/Documentation/sphinx/cdomain.py b/Documentation/sphinx/cdomain.py
index 4eb150bf509c..e6959af25402 100644
--- a/Documentation/sphinx/cdomain.py
+++ b/Documentation/sphinx/cdomain.py
@@ -127,11 +127,7 @@ def setup(app):
 
     # Handle easy Sphinx 3.1+ simple new tags: :c:expr and .. c:namespace::
     app.connect('source-read', c_markups)
-
-    if (major == 1 and minor < 8):
-        app.override_domain(CDomain)
-    else:
-        app.add_domain(CDomain, override=True)
+    app.add_domain(CDomain, override=True)
 
     return dict(
         version = __version__,
diff --git a/Documentation/sphinx/kfigure.py b/Documentation/sphinx/kfigure.py
index 13e885bbd499..97166333b727 100644
--- a/Documentation/sphinx/kfigure.py
+++ b/Documentation/sphinx/kfigure.py
@@ -61,13 +61,7 @@ import sphinx
 from sphinx.util.nodes import clean_astext
 import kernellog
 
-# Get Sphinx version
-major, minor, patch = sphinx.version_info[:3]
-if major == 1 and minor > 3:
-    # patches.Figure only landed in Sphinx 1.4
-    from sphinx.directives.patches import Figure  # pylint: disable=C0413
-else:
-    Figure = images.Figure
+Figure = images.Figure
 
 __version__  = '1.0.0'