gnu: Remove rust-impl-num-traits-0.1.

* gnu/packages/crates-io.scm (rust-impl-num-traits-0.1): Delete variable.

gnu/packages/crates-io.scm

@@ -71642,29 +71642,6 @@ for uint and fixed hash.")
 and fixed hash.")
     (license (list license:expat license:asl2.0))))
 
-(define-public rust-impl-num-traits-0.1
-  (package
-    (name "rust-impl-num-traits")
-    (version "0.1.1")
-    (source
-      (origin
-        (method url-fetch)
-        (uri (crate-uri "impl-num-traits" version))
-        (file-name (string-append name "-" version ".tar.gz"))
-        (sha256
-          (base32 "0rjlic3z684l37qm7zywmxhhllnf982y3ilyslyxb6jiddyhbdiq"))))
-    (build-system cargo-build-system)
-    (arguments
-      `(#:cargo-inputs
-        (("rust-integer-sqrt" ,rust-integer-sqrt-0.1)
-         ("rust-num-traits" ,rust-num-traits-0.2)
-         ("rust-uint" ,rust-uint-0.9))))
-    (home-page "https://github.com/paritytech/parity-common")
-    (synopsis "num-traits implementation for uint")
-    (description "This package provides @code{num-traits} implementation
-for @code{uint}.")
-    (license (list license:expat license:asl2.0))))
-
 (define-public rust-impl-serde-0.3
   (package
     (name "rust-impl-serde")