gnu: python-vine: Fix build.

* gnu/packages/python-xyz.scm (python-vine)
[arguments]<test-flags>: Skip 4 tests.
[native-inputs]: Remove python-case.

Change-Id: I4e8f359556bd97bf6d21a8ac7b7e4823e21043fb

gnu/packages/python-xyz.scm

@@ -6521,8 +6521,18 @@ (define-public python-vine
        (sha256
         (base32 "1q31krwxdvwawdn1kfqmpplix31d4jhs0qng26908hawsf0yjqlb"))))
     (build-system pyproject-build-system)
+    (arguments
+     (list
+      #:test-flags
+      ;; AttributeError: 'test_barrier' object has no attribute 'ps'.
+      #~(list "-k" (string-join
+                    (list "not test_evaluate"
+                          "test_reverse"
+                          "test_cancel"
+                          "test_throw")
+                    " and not "))))
     (native-inputs
-     (list python-pytest python-case python-setuptools python-wheel))
+     (list python-pytest python-setuptools python-wheel))
     (home-page "https://github.com/celery/vine")
     (synopsis "Promises for Python")
     (description