gnu: Remove python-dask-expr.

* gnu/packages/python-science.scm (python-dask/bootstrap)
(python-dask-expr): Delete variables.

Fixes: guix/guix#4766
Change-Id: I8243329353fe41b0ffff35fd4383a9a09047cd52

gnu/packages/python-science.scm

@@ -877,70 +877,6 @@ larger-than-memory or distributed environments.  These parallel collections
 run on top of the dynamic task schedulers.")
     (license license:bsd-3)))
 
-(define-public python-dask/bootstrap
-  (package
-    (inherit python-dask)
-    (properties '((hidden? . #true)))
-    (arguments
-     (substitute-keyword-arguments (package-arguments python-dask)
-       ((#:tests? _ #t) #f)))
-    (propagated-inputs
-     (modify-inputs (package-propagated-inputs python-dask)
-       (delete "python-dask-expr")))))
-
-(define-public python-dask-expr
-  (package
-    (name "python-dask-expr")
-    (version "1.1.21")
-    (source
-     (origin
-       (method git-fetch)
-       (uri (git-reference
-             (url "https://github.com/dask/dask-expr")
-             (commit (string-append "v" version))))
-       (file-name (git-file-name name version))
-       (sha256
-        (base32 "0m920db2asmqf4w2dncpnkccdhx4c9sfcsd96bh1jfdh8sw2wf6z"))))
-    (build-system pyproject-build-system)
-    (arguments
-     (list
-      #:tests? #false ;need python-distributed, which needs dask-expr.
-      #:phases
-      #~(modify-phases %standard-phases
-          (add-after 'unpack 'versioneer
-            (lambda _
-              ;; Our version of versioneer needs setup.cfg.  This is adapted
-              ;; from pyproject.toml.
-              (with-output-to-file "setup.cfg"
-                (lambda ()
-                  (display "\
-[versioneer]
-VCS = git
-style = pep440
-versionfile_source = dask_expr/_version.py
-versionfile_build = dask_expr/_version.py
-tag_prefix =
-parentdir_prefix = dask_expr-
-")))
-              (invoke "versioneer" "install")
-              (substitute* "setup.py"
-                (("versioneer.get_version\\(\\)")
-                 (string-append "\"" #$version "\""))))))))
-    (propagated-inputs (list python-pandas python-pyarrow))
-    (native-inputs
-     ;; We use python-dask/bootstrap so that python-dask can propagate this
-     ;; package without creating a mutually recursive dependency.
-     (list python-dask/bootstrap
-           python-pytest
-           python-setuptools
-           python-versioneer
-           python-wheel))
-    (home-page "https://github.com/dask/dask-expr")
-    (synopsis "Dask DataFrames with query optimization")
-    (description "This is a rewrite of Dask DataFrame that includes query
-optimization and generally improved organization.")
-    (license license:bsd-3)))
-
 (define-public python-dask-image
   (package
     (name "python-dask-image")