gnu: r-gdata: Update to 3.0.0.

* gnu/packages/statistics.scm (r-gdata): Update to 3.0.0.
[inputs]: Remove perl.

Change-Id: If9a66e4c8a8030214d53d7b2934c79cd098a278c

gnu/packages/statistics.scm

@@ -5164,17 +5164,15 @@ tests for whether a value is missing, empty or contains only @code{NA} and
 (define-public r-gdata
   (package
     (name "r-gdata")
-    (version "2.19.0")
+    (version "3.0.0")
     (source
      (origin
        (method url-fetch)
        (uri (cran-uri "gdata" version))
        (sha256
         (base32
-         "1lv3cz990f7m2bfcf62fjm6wz6zd2ycrci06b7mfd0xmcn3bwifi"))))
+         "0zxi0634dkgczw7gicj8r6mhb83cpkxhsy2iivz0b9v52y9bjmm4"))))
     (build-system r-build-system)
-    (inputs
-     (list perl))
     (propagated-inputs
      (list r-gtools))
     (home-page "https://cran.r-project.org/web/packages/gdata")