gnu: Remove duplicate go-github-com-kr-text.

This effectively reverts 56f610f5c7. But I removed
the preexisting package since the new one is simpler.

* gnu/packages/golang.scm (go-github-com-kr-text): Remove variable.

gnu/packages/golang.scm

@@ -2117,32 +2117,6 @@ methods can be called and usual operations such as indexing or arithmetic can
 be performed.")
       (license license:expat))))
 
-(define-public go-github-com-kr-text
-  (let ((commit "e2ffdb16a802fe2bb95e2e35ff34f0e53aeef34f")
-        (revision "0"))
-    (package
-      (name "go-github-com-kr-text")
-      (version (git-version "0.0.0" revision commit))
-      (source
-       (origin
-         (method git-fetch)
-         (uri (git-reference
-               (url
-                "https://github.com/kr/text")
-               (commit commit)))
-         (file-name (git-file-name name version))
-         (sha256
-          (base32
-           "1gm5bsl01apvc84bw06hasawyqm4q84vx1pm32wr9jnd7a8vjgj1"))))
-      (build-system go-build-system)
-      (arguments
-       `(#:import-path "github.com/kr/text"))
-      (home-page "https://github.com/kr/text")
-      (synopsis "Go package for manipulating paragraphs of text")
-      (description "Package @code{text} provides manipulation Go functions for
-paragraphs of text.")
-      (license license:expat))))
-
 (define-public go-github-com-michiwend-golang-pretty
   (let ((commit "8ac61812ea3fa540f3f141a444fcb0dd713cdca4")
         (revision "0"))