gnu: Remove tlsdate.

As discussed in <https://bugs.gnu.org/46602>, tlsdate does not support a
current release of OpenSSL.

* gnu/packages/ntp.scm (tlsdate): Remove variable.

gnu/packages/ntp.scm

@@ -216,54 +216,3 @@ (define-public openntpd
 minimalist than ntpd.")
     ;; A few of the source files are under bsd-3.
     (license (list l:isc l:bsd-3))))
-
-(define-public tlsdate
-  (package
-    (name "tlsdate")
-    (version "0.0.13")
-    (home-page "https://github.com/ioerror/tlsdate")
-    (source (origin
-              (method git-fetch)
-              (uri (git-reference
-                    (commit (string-append "tlsdate-" version))
-                    (url home-page)))
-              (sha256
-               (base32
-                "0w3v63qmbhpqlxjsvf4k3zp90k6mdzi8cdpgshan9iphy1f44xgl"))
-              (file-name (string-append name "-" version "-checkout"))))
-    (build-system gnu-build-system)
-    (arguments
-     `(;; Disable seccomp when it's not supported--e.g., on aarch64.  See
-       ;; 'src/seccomp.c' for the list of supported systems.
-       #:configure-flags ,(if (any (lambda (system)
-                                     (string-contains (or
-                                                       (%current-target-system)
-                                                       (%current-system))
-                                                      system))
-                                   '("x86_64" "i686" "arm"))
-                              ''()
-                              ''("--disable-seccomp-filter"))
-
-       #:phases (modify-phases %standard-phases
-                  (add-after 'unpack 'autogen
-                    (lambda _
-                      ;; The ancestor of 'SOURCE_DATE_EPOCH'; it contains the
-                      ;; date that is recorded in binaries.  It must be a
-                      ;; "recent date" since it is used to detect bogus dates
-                      ;; received from servers.
-                      (setenv "COMPILE_DATE" (number->string 1530144000))
-                      (invoke "sh" "autogen.sh"))))))
-    (inputs `(("openssl" ,openssl-1.0)
-              ("libevent" ,libevent)))
-    (native-inputs `(("pkg-config" ,pkg-config)
-                     ("autoconf" ,autoconf)
-                     ("automake" ,automake)
-                     ("libtool" ,libtool)))
-    (synopsis "Extract remote time from TLS handshakes")
-    (description
-     "@command{tlsdate} sets the local clock by securely connecting with TLS
-to remote servers and extracting the remote time out of the secure handshake.
-Unlike ntpdate, @command{tlsdate} uses TCP, for instance connecting to a
-remote HTTPS or TLS enabled service, and provides some protection against
-adversaries that try to feed you malicious time information.")
-    (license l:bsd-3)))