gnu: curl: Remove unused input.

* gnu/packages/curl.scm (curl)[inputs]: Remove LIBSSH2-1.8.0.
* gnu/packages/ssh.scm (libssh2-1.8.0): Remove variable.

gnu/packages/curl.scm

@@ -64,11 +64,6 @@
               "doc"))                             ;1.2 MiB of man3 pages
    (inputs `(("gnutls" ,gnutls)
              ("libidn" ,libidn)
-             ;; TODO XXX <https://bugs.gnu.org/34927>
-             ;; Curl doesn't actually use or refer to libssh2 because the build
-             ;; is not configured with '--with-libssh2'.  Remove this input when
-             ;; a mass rebuild is appropriate (e.g. core-updates).
-             ("libssh2" ,libssh2-1.8.0)
              ("openldap" ,openldap)
              ("mit-krb5" ,mit-krb5)
              ("nghttp2" ,nghttp2 "lib")

gnu/packages/ssh.scm

@@ -143,24 +143,6 @@ a server that supports the SSH-2 protocol.")
    (license license:bsd-3)
    (home-page "https://www.libssh2.org/")))
 
-;; XXX A hidden special obsolete libssh2 for temporary use in the curl package.
-;; <https://bugs.gnu.org/34927>
-(define-public libssh2-1.8.0
-  (hidden-package
-    (package
-      (inherit libssh2)
-      (version "1.8.0")
-      (source (origin
-                (method url-fetch)
-                (uri (string-append
-                      "https://www.libssh2.org/download/libssh2-"
-                      version ".tar.gz"))
-                (sha256
-                 (base32
-                  "1m3n8spv79qhjq4yi0wgly5s5rc8783jb1pyra9bkx1md0plxwrr"))
-                (patches
-                 (search-patches "libssh2-fix-build-failure-with-gcrypt.patch")))))))
-
 (define-public openssh
   (package
    (name "openssh")