docs/conf.py: simplify code updating sys.path

Author: jcfr

docs/conf.py

@@ -13,22 +13,13 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import os
-import sys
-
 # 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.
-sys.path.insert(0, os.path.abspath('.'))
-
-# Get the project root dir, which is the parent dir of this
-cwd = os.getcwd()
-project_root = os.path.dirname(cwd)
-
-# Insert the project root dir as the first element in the PYTHONPATH.
-# This lets us ensure that the source package is imported, and that its
-# version is used.
-sys.path.insert(0, project_root)
+#
+import os
+import sys
+sys.path.insert(0, os.path.abspath('..'))
 
 import cmake