gnu: vim-neocomplete: Use copy-build-system.

* gnu/packages/vim.scm (vim-neocomplete)[build-system]: Switch to
copy-build-system.
[arguments]: Adjust accordingly.

gnu/packages/vim.scm

@@ -32,6 +32,7 @@
   #:use-module (guix download)
   #:use-module (guix git-download)
   #:use-module (guix build-system cmake)
+  #:use-module (guix build-system copy)
   #:use-module (guix build-system gnu)
   #:use-module (guix build-system python)
   #:use-module (gnu packages)
@@ -287,24 +288,12 @@ written in the Python 3, Perl, Ruby, Tcl, and Lua programming languages.")))
        (sha256
         (base32
          "1h6sci5mhdfg6sjsjpi8l5li02hg858zcayiwl60y9j2gqnd18lv"))))
-    (build-system gnu-build-system)
+    (build-system copy-build-system)
     (arguments
-     `(#:tests? #f
-       #:phases
-       (modify-phases %standard-phases
-         (delete 'configure)
-         (delete 'build)
-         (replace 'install
-           (lambda* (#:key outputs #:allow-other-keys)
-             (let* ((out (assoc-ref outputs "out"))
-                    (vimfiles (string-append out "/share/vim/vimfiles"))
-                    (autoload (string-append vimfiles "/autoload"))
-                    (doc (string-append vimfiles "/doc"))
-                    (plugin (string-append vimfiles "/plugin")))
-               (copy-recursively "autoload" autoload)
-               (copy-recursively "doc" doc)
-               (copy-recursively "plugin" plugin)
-               #t))))))
+     '(#:install-plan
+       '(("autoload" "share/vim/vimfiles/")
+         ("doc" "share/vim/vimfiles/")
+         ("plugin" "share/vim/vimfiles/"))))
     (synopsis "Next generation completion framework for Vim")
     (description
      "@code{neocomplete}, an abbreviation of 'neo-completion with cache',