gnu: python-dbus-python: Reduce closure size.

Tests never run before and silently were skipped because test-backend is
not known for pyrpoject-build-system which is tappy, this change
visually disables tests and remove some unused inputs from closure.

* gnu/packages/python-xyz.scm (python-dbus-python):
  [native-inputs]: Remove python-sphinx, python-sphinx-rtd-theme, and
  python-wheel.

Change-Id: I042ceace8f42ae8514751ffe0fee664db05ce2cc

gnu/packages/python-xyz.scm

@@ -31836,6 +31836,7 @@ Its algorithms are based on the kakasi library, which is written in C.")
     (build-system pyproject-build-system)
     (arguments
      (list
+      #:tests? #f ;XXX: Tests require setup
       #:phases
       #~(modify-phases %standard-phases
           (add-after 'unpack 'patch-requirements
@@ -31846,15 +31847,12 @@ Its algorithms are based on the kakasi library, which is written in C.")
                 (("(ninja|patchelf)") "")))))))
     (native-inputs
      (list pkg-config
-           python-meson-python
            meson
            ninja/pinned
            patchelf
+           python-meson-python
            python-setuptools
-           python-sphinx
+           python-tappy))
-           python-sphinx-rtd-theme
-           python-tappy
-           python-wheel))
     (inputs
      (list dbus glib))
     (propagated-inputs