gnu: libxls: Move to (gnu packages statistics).

It has nothing to do with XML.

* gnu/packages/xml.scm (libxls): Move from here…
* gnu/packages/statistics.scm (libxls): …to here.

gnu/packages/statistics.scm

@@ -8,7 +8,7 @@
 ;;; Copyright © 2016 Ben Woodcroft <donttrustben@gmail.com>
 ;;; Copyright © 2016, 2017 Raoul Bonnal <ilpuccio.febo@gmail.com>
 ;;; Copyright © 2017 Kyle Meyer <kyle@kyleam.com>
-;;; Copyright © 2017, 2018 Tobias Geerinckx-Rice <me@tobias.gr>
+;;; Copyright © 2017, 2018, 2019 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2017 Alex Kost <alezost@gmail.com>
 ;;; Copyright © 2018 Alex Branham <alex.branham@gmail.com>
 ;;;
@@ -150,6 +150,27 @@ simulation not wholly unlike BUGS.  JAGS was written with three aims in mind:
 @end enumerate\n")
     (license license:gpl2)))
 
+(define-public libxls
+  (package
+    (name "libxls")
+    (version "1.5.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://github.com/libxls/libxls/releases/download/"
+                           "v" version "/libxls-" version ".tar.gz"))
+       (sha256
+        (base32 "00j2lrcvvhclmh3z9vy7myqq1br1jnnqkz2wzgk4a1gbg8c5afn5"))))
+    (build-system gnu-build-system)
+    (home-page "https://github.com/libxls/libxls")
+    (synopsis "Read binary (.xls) Excel spreadsheet files")
+    (description
+     "libxls is a C library to read .xls spreadsheet files in the binary OLE
+BIFF8 format as created by Excel 97 and later versions.  It cannot write them.
+
+This package also provides @command{xls2csv} to export Excel files to CSV.")
+    (license license:bsd-2)))
+
 ;; Update this package together with the set of recommended packages: r-boot,
 ;; r-class, r-cluster, r-codetools, r-foreign, r-kernsmooth, r-lattice,
 ;; r-mass, r-matrix, r-mgcv, r-nlme, r-nnet, r-rpart, r-spatial, r-survival.

gnu/packages/xml.scm

@@ -1254,27 +1254,6 @@ files.  It is designed to be fast and to handle large input files.")
 (define-public python2-defusedxml
   (package-with-python2 python-defusedxml))
 
-(define-public libxls
-  (package
-    (name "libxls")
-    (version "1.5.0")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (string-append "https://github.com/libxls/libxls/releases/download/"
-                           "v" version "/libxls-" version ".tar.gz"))
-       (sha256
-        (base32 "00j2lrcvvhclmh3z9vy7myqq1br1jnnqkz2wzgk4a1gbg8c5afn5"))))
-    (build-system gnu-build-system)
-    (home-page "https://github.com/libxls/libxls")
-    (synopsis "Read binary (.xls) Excel spreadsheet files")
-    (description
-     "libxls is a C library to read .xls spreadsheet files in the binary OLE
-BIFF8 format as created by Excel 97 and later versions.  It cannot write them.
-
-This package also provides @command{xls2csv} to export Excel files to CSV.")
-    (license license:bsd-2)))
-
 (define-public freexl
   (package
     (name "freexl")