gnu: go-github-com-dustin-go-humanize: Move to golang-xyz.

* gnu/packages/golang.scm (go-github-com-dustin-go-humanize): Move from
here ...
* gnu/packages/golang-xyz.scm: ... to here.
* gnu/packages/uucp.scm: Add golang-xyz module.

Change-Id: Ic0913615d559ec255bf98abfab99383edf3c9a84

gnu/packages/golang.scm

@@ -6905,30 +6905,6 @@ the External Data Representation (XDR) standard protocol as specified in RFC
 4506 (obsoletes RFC 1832 and RFC 1014) in pure Go.")
     (license license:isc)))
 
-(define-public go-github-com-dustin-go-humanize
-  (package
-    (name "go-github-com-dustin-go-humanize")
-    (version "1.0.1")
-    (source
-     (origin
-       (method git-fetch)
-       (uri (git-reference
-             (url "https://github.com/dustin/go-humanize")
-             (commit (string-append "v" version))))
-       (file-name (git-file-name name version))
-       (sha256
-        (base32
-         "1iyhd90pnmxh64nhsh6k02c1b1glpmhh4whga9jgb9g0i5hz3sya"))))
-    (build-system go-build-system)
-    (arguments
-     '(#:import-path "github.com/dustin/go-humanize"))
-    (home-page "https://github.com/dustin/go-humanize")
-    (synopsis "Humane unit formatter")
-    (description "@code{go-humanize} provides formatters for units to human
-friendly sizes.  It converts boring ugly numbers to human-friendly strings and
-back.")
-    (license license:expat)))
-
 (define-public go-gopkg-in-djherbis-times-v1
   (package
     (name "go-gopkg-in-djherbis-times-v1")