gnu: python-watchgod: Fix build.

The latest version depends on a long list of Rust packages and maturin
build system, this change just fixes the build.

* gnu/packages/python-xyz.scm (python-watchgod):
[arguments]<phases>: Remove 'sanity-check, all tests passed.
[native-inputs]: Remove python-pytest-toolbox.

Change-Id: I36e84ed09a2321636257c0a5528bf01aea1d2d7e

gnu/packages/python-xyz.scm

@@ -31608,7 +31608,9 @@ but portable.")
     (arguments
      (list #:test-flags '(list "-o" "asyncio_mode=auto"
                                ;; PytestUnraisableExceptionWarning
-                               "-k" "not test_watch_log and not test_awatch")))
+                               "-k" "not test_watch_log and not test_awatch")
+       #:phases #~(modify-phases %standard-phases
+                  (delete 'sanity-check))))
     (native-inputs
      (list python-anyio
            python-coverage
@@ -31618,7 +31620,6 @@ but portable.")
            python-pytest-cov
            python-pytest-mock
            python-pytest-sugar
-           python-pytest-toolbox
            python-setuptools
            python-wheel))
     (home-page "https://github.com/samuelcolvin/watchgod")