gnu: Remove duplicated perl-extutils-depends.

This was first added in 84e8b19fe1, and then
again in 017b014ce4.

* gnu/packages/perl.scm (perl-extutils-depends): Remove duplicated package
definition.

gnu/packages/perl.scm

@@ -3166,30 +3166,6 @@ and alternative installers with the `installler` option.  But it's written in
 only about 40% as many lines of code and with zero non-core dependencies.")
     (license (package-license perl))))
 
-(define-public perl-extutils-depends
-  (package
-    (name "perl-extutils-depends")
-    (version "0.405")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (string-append
-             "mirror://cpan/authors/id/X/XA/XAOC/ExtUtils-Depends-"
-             version
-             ".tar.gz"))
-       (sha256
-        (base32
-         "0b4ab9qmcihsfs2ajhn5qzg7nhazr68v3r0zvb7076smswd41mla"))))
-    (build-system perl-build-system)
-    (native-inputs
-     `(("perl-test-number-delta"
-        ,perl-test-number-delta)))
-    (home-page "http://search.cpan.org/dist/ExtUtils-Depends/")
-    (synopsis "Easily build XS extensions that depend on XS extensions")
-    (description "ExtUtils::Depends builds XS extensions that depend on XS
-extensions")
-    (license (package-license perl))))
-
 (define-public perl-extutils-installpaths
   (package
     (name "perl-extutils-installpaths")