gnu: Remove r-ffbase.

ffbase was removed from CRAN in 2022.

* gnu/packages/cran.scm (r-ffbase): Remove variable.

Change-Id: I3fe2814b041bc575cf85715096086f323bb6578f

gnu/packages/cran.scm

@@ -16759,38 +16759,6 @@ in main memory.")
     (supported-systems (delete "aarch64-linux" %supported-systems))
     (license license:gpl2)))
 
-(define-public r-ffbase
-  (package
-    (name "r-ffbase")
-    (version "0.13.3")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (cran-uri "ffbase" version))
-       (sha256
-        (base32
-         "1dp6lblfq2j7r1b4b8ls47jlx8j27n88d5vp8w116lb8pa01zxmk"))))
-    (build-system r-build-system)
-    (arguments
-     (list
-      #:phases
-      '(modify-phases %standard-phases
-         ;; R 4.3.0 removed the typedef for Sint, which used to be just int.
-         (add-after 'unpack 'r-compatibility
-           (lambda _
-             (substitute* '("src/grouprunningcumsum.c"
-                            "src/grouprunningcumsumindex.c")
-               (("\\bSint ") "int ")))))))
-    (propagated-inputs
-     (list r-bit r-fastmatch r-ff))
-    (native-inputs (list r-laf r-testthat))
-    (home-page "https://github.com/edwindj/ffbase")
-    (synopsis "Basic statistical functions for package 'ff'")
-    (description
-     "This package extends the out of memory vectors of @code{ff} with
-statistical functions and other utilities to ease their usage.")
-    (license license:gpl3)))
-
 (define-public r-prettyunits
   (package
     (name "r-prettyunits")