Remove the path setup from docs/conf.py

The guitarpro package is expected to be installed when the docs are
being built.

Author: Perlence

docs/conf.py

@@ -9,17 +9,7 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-# -- Path setup --------------------------------------------------------------
-
-# 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.
-
 import importlib.metadata
-import os
-import sys
-sys.path.insert(0, os.path.abspath('..'))
-
 
 # -- General configuration -----------------------------------------------------