diff --git a/.flake8 b/.flake8
index dd80ca9b6a0..7bad3afc185 100644
--- a/.flake8
+++ b/.flake8
@@ -25,7 +25,6 @@ per-file-ignores =
     doc/python/m.distance.py: E501
     doc/gui/wxpython/example/dialogs.py: F401
     gui/scripts/d.wms.py: E501
-    gui/wxpython/docs/wxgui_sphinx/conf.py: E402, W291
     gui/wxpython/gcp/manager.py: E722
     gui/wxpython/gui_core/*: E722
     gui/wxpython/gui_core/dialogs.py: E722
diff --git a/gui/wxpython/docs/wxgui_sphinx/conf.py b/gui/wxpython/docs/wxgui_sphinx/conf.py
index 3641c2aab48..f0b61a31996 100644
--- a/gui/wxpython/docs/wxgui_sphinx/conf.py
+++ b/gui/wxpython/docs/wxgui_sphinx/conf.py
@@ -10,21 +10,9 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import sys
-import os
 from datetime import date
 import string
 from shutil import copy
-
-# If extensions (or modules to document with autodoc) are in another directory,
-# add these directories to sys.path here. If the directory is relative to the
-# documentation root, use os.path.abspath to make it absolute, like shown here.
-if not os.getenv("GISBASE"):
-    sys.exit("GISBASE not defined")
-sys.path.insert(
-    0, os.path.abspath(os.path.join(os.environ["GISBASE"], "etc", "python", "grass"))
-)
-
 from grass.script import core
 
 footer_tmpl = string.Template(