Revert "Merge branch 'doc/use_sphinx_reredirect_extension' into 'master'"

This reverts merge request !13293

docs/conf_common.py

@@ -55,8 +55,8 @@ extensions = ['breathe',
               'sphinxcontrib.rackdiag',
               'sphinxcontrib.packetdiag',
               'sphinxcontrib.cairosvgconverter',
-              'sphinx_reredirects',
 
+              'extensions.html_redirects',
               'extensions.toctree_filter',
               'extensions.list_filter',
               'extensions.google_analytics',
@@ -260,24 +260,16 @@ project_homepage = 'https://github.com/espressif/esp-idf'
 
 # -- Options for HTML output ----------------------------------------------
 
-# Add redirections for sphinx_reredirects extension
+# Custom added feature to allow redirecting old URLs
 #
-# sphinx_reredirects requires extensions be specified in a Dictionary called 'redirects'
-# See https://pypi.org/project/sphinx-reredirects/ for more details
+# Redirects should be listed in page_redirects.xt
 #
-# We need to read the redirections from page_redirects.txt that are spaced separated
-# and convert them into a Dict
-
-redirects = {}
 with open('../page_redirects.txt') as f:
     lines = [re.sub(' +', ' ', line.strip()) for line in f.readlines() if line.strip() != '' and not line.startswith('#')]
     for line in lines:  # check for well-formed entries
         if len(line.split(' ')) != 2:
             raise RuntimeError('Invalid line in page_redirects.txt: %s' % line)
-        else:
-            old_path = line.split(' ')[0]
-            new_path = line.split(' ')[1]
-            redirects[old_path] = new_path
+html_redirect_pages = [tuple(line.split(' ')) for line in lines]
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.