gnu: python2-larch: Remove package.

* gnu/packages/python-xyz.scm (python2-larch): Remove variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/python-xyz.scm

@@ -17269,50 +17269,6 @@ (define-public python2-tracing
 happens using the @code{logging} library.")
     (license license:gpl3+)))
 
-(define-public python2-larch
-  (package
-    (name "python2-larch")
-    (version "1.20151025")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (string-append
-             "http://git.liw.fi/cgi-bin/cgit/cgit.cgi/larch/snapshot/larch-"
-             version ".tar.gz"))
-       (patches (search-patches
-                 "python2-larch-coverage-4.0a6-compatibility.patch"))
-       (sha256
-        (base32
-         "1p4knkkavlqymgciz2wbcnfrdgdbafhg14maplnk4vbw0q8xs663"))))
-    (build-system python-build-system)
-    (arguments
-     `(#:python ,python-2
-       #:phases
-       (modify-phases %standard-phases
-         ;; check phase needs to be run before the build phase. If not,
-         ;; coverage-test-runner looks for tests for the built source files,
-         ;; and fails.
-         (delete 'check)
-         (add-before 'build 'check
-           (lambda _ (invoke "make" "check"))))))
-    (native-inputs
-     `(("cmdtest" ,cmdtest)
-       ("python2-coverage-test-runner" ,python2-coverage-test-runner)))
-    (propagated-inputs
-     `(("python2-tracing" ,python2-tracing)))
-    (home-page "https://liw.fi/larch/")
-    (synopsis "Python copy-on-write B-tree library")
-    (description "@code{python2-larch} is an implementation of
-particular kind of B-tree, based on research by Ohad Rodeh.  See
-@url{http://liw.fi/larch/ohad-btrees-shadowing-clones.pdf} for details
-on the data structure.
-
-The distinctive feature of this B-tree is that a node is never
-(conceptually) modified.  Instead, all updates are done by
-copy-on-write.  This makes it easy to clone a tree, and modify only the
-clone, while other processes access the original tree.")
-    (license license:gpl3+)))
-
 (define-public python-astroid
   (package
     (name "python-astroid")