clean code & remove sphinx version restriction

Author: NirobNabil

doc/conf.py

@@ -180,7 +180,6 @@ def _check_dependencies():
 # Import only after checking for dependencies.
 # gallery_order.py from the sphinxext folder provides the classes that
 # allow custom ordering of sections and subsections of the gallery
-import sphinxext.gallery_order as gallery_order
 
 # The following import is only necessary to monkey patch the signature later on
 from sphinx_gallery import gen_rst

doc/sphinxext/util.py

@@ -1,6 +1,6 @@
 import sys
 
-# Sphinx gallery configuration
+
 def matplotlib_reduced_latex_scraper(block, block_vars, gallery_conf,
                                      **kwargs):
     """
@@ -17,4 +17,4 @@ def matplotlib_reduced_latex_scraper(block, block_vars, gallery_conf,
 
 
 def clear_basic_unit(gallery_conf, fname):
-    return sys.modules.pop('basic_units', None)
+    return sys.modules.pop('basic_units', None)

requirements/doc/doc-requirements.txt

@@ -7,7 +7,7 @@
 # Install the documentation requirements with:
 #     pip install -r requirements/doc/doc-requirements.txt
 #
-sphinx>=3.0.0,!=6.1.2,!=7.3.*
+sphinx>=3.0.0
 colorspacious
 ipython
 ipywidgets