gnu: Remove python2-pytest-mock.

* gnu/packages/check.scm (python2-pytest-mock): Delete variable.
(python-pytest-mock)[properties]: Delete field.

gnu/packages/check.scm

@@ -1401,29 +1401,8 @@ around the patching API provided by the @code{mock} package, but with the
 benefit of not having to worry about undoing patches at the end of a test.
 The mocker fixture has the same API as @code{mock.patch}, supporting the
 same arguments.")
-    (properties `((python2-variant . ,(delay python2-pytest-mock))))
     (license license:expat)))
 
-(define-public python2-pytest-mock
-  (let ((base (package-with-python2
-               (strip-python2-variant python-pytest-mock))))
-    (package/inherit base
-      (version "1.10.1")
-      (source
-       (origin
-         (method url-fetch)
-         (uri (pypi-uri "pytest-mock" version))
-         (sha256
-          (base32
-           "1i5mg3ff1qk0wqfcxfz60hwy3q5dskdp36i10ckigkzffg8hc3ad"))))
-      (arguments
-       `(#:python ,python-2))
-      (native-inputs
-       `(("python2-setuptools-scm" ,python2-setuptools-scm)))
-      (propagated-inputs
-       `(("python2-mock" ,python2-mock)
-         ("python2-pytest" ,python2-pytest))))))
-
 (define-public python-pytest-xdist
   (package
     (name "python-pytest-xdist")