gnu: Remove python-pathtools.

The same functionality is a part of standard Python library, this
project is not maintained since 2014, see:
<https://github.com/gorakhargosh/pathtools/issues/4>.

* gnu/packages/python-xyz.scm (python-pathtools): Delete variable.

Change-Id: Ia08ee219243c8f96a15992d5d556679b550bf457

gnu/packages/python-xyz.scm

@@ -32321,25 +32321,6 @@ the import name as the name on PyPI.  All subpackages and data files within a
 package are included automatically.")
     (license license:bsd-3)))
 
-(define-public python-pathtools
-  (package
-    (name "python-pathtools")
-    (version "0.1.2")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (pypi-uri "pathtools" version))
-       (sha256
-        (base32
-         "1h7iam33vwxk8bvslfj4qlsdprdnwf8bvzhqh3jq5frr391cadbw"))))
-    (build-system python-build-system)
-    (home-page
-     "https://github.com/gorakhargosh/pathtools")
-    (synopsis "Path utilities for Python")
-    (description "Pattern matching and various utilities for file systems
-paths.")
-    (license license:expat)))
-
 (define-public python-fastentrypoints
   (package
     (name "python-fastentrypoints")