gnu: Remove rust-tokio-proto-0.1.

* gnu/packages/crates-io.scm (rust-tokio-proto-0.1): Delete variable.

gnu/packages/crates-io.scm

@@ -60034,40 +60034,6 @@ in Rust.")
 futures.")
     (license license:expat)))
 
-(define-public rust-tokio-proto-0.1
-  (package
-    (name "rust-tokio-proto")
-    (version "0.1.1")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (crate-uri "tokio-proto" version))
-       (file-name (string-append name "-" version ".tar.gz"))
-       (sha256
-        (base32 "12833cckniq3y83zjhk2ayv6qpr99d4mj1h3hz266g1mh6p4gfwg"))))
-    (build-system cargo-build-system)
-    (arguments
-     `(#:skip-build? #t
-       #:cargo-inputs
-       (("rust-futures" ,rust-futures-0.1)
-        ("rust-log" ,rust-log-0.3)
-        ("rust-net2" ,rust-net2-0.2)
-        ("rust-rand" ,rust-rand-0.3)
-        ("rust-slab" ,rust-slab-0.3)
-        ("rust-smallvec" ,rust-smallvec-0.2)
-        ("rust-take" ,rust-take-0.1)
-        ("rust-tokio-core" ,rust-tokio-core-0.1)
-        ("rust-tokio-io" ,rust-tokio-io-0.1)
-        ("rust-tokio-service" ,rust-tokio-service-0.1))))
-    (home-page "https://tokio.rs")
-    (synopsis
-     "Network application framework for deployment of clients and servers")
-    (description
-     "This package provides a network application framework for rapid
-development and highly scalable production deployments of clients and
-servers.")
-    (license (list license:expat license:asl2.0))))
-
 (define-public rust-tokio-reactor-0.1
   (package
     (name "rust-tokio-reactor")