gnu: Remove rust-mdns-0.3.

* gnu/packages/crates-io.scm (rust-mdns-0.3): Delete variable.

gnu/packages/crates-io.scm

@@ -33385,32 +33385,6 @@ (define-public rust-md5-asm-0.4
     (supported-systems '("x86_64-linux" "i686-linux"))
     (license license:expat)))
 
-(define-public rust-mdns-0.3
-  (package
-    (name "rust-mdns")
-    (version "0.3.2")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (crate-uri "mdns" version))
-       (file-name
-        (string-append name "-" version ".tar.gz"))
-       (sha256
-        (base32 "0a96id6nzpbqhdiv90fdmaji0nlmfsdcbk1nvrmapv5xw6fiaclw"))))
-    (build-system cargo-build-system)
-    (arguments
-     `(#:cargo-inputs
-       (("rust-dns-parser" ,rust-dns-parser-0.8)
-        ("rust-error-chain" ,rust-error-chain-0.12)
-        ("rust-get-if-addrs" ,rust-get-if-addrs-0.5)
-        ("rust-mio" ,rust-mio-0.6)
-        ("rust-net2" ,rust-net2-0.2))))
-    (home-page "https://github.com/dylanmckay/mdns")
-    (synopsis "Multicast DNS client library")
-    (description "This package provides a multicast DNS client library.  It
-supports discovery of any mDNS device on a LAN.")
-    (license license:expat)))
-
 (define-public rust-measureme-0.7
   (package
     (name "rust-measureme")