gnu: Remove rust-winpty-sys-0.4.

* gnu/packages/crates-io.scm (rust-winpty-sys-0.4): Delete variable.

gnu/packages/crates-io.scm

@@ -69507,30 +69507,6 @@ (define-public rust-wincolor-0.1
        #:cargo-inputs
        (("rust-winapi" ,rust-winapi-0.3))))))
 
-(define-public rust-winpty-sys-0.4
-  (package
-    (name "rust-winpty-sys")
-    (version "0.4.3")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (crate-uri "winpty-sys" version))
-       (file-name
-        (string-append name "-" version ".tar.gz"))
-       (sha256
-        (base32
-         "0s5m2vvlw7wphc466s47zfmp08zk00wzj999l1w3ajqlxbnfgb9x"))))
-    (build-system cargo-build-system)
-    (arguments
-     `(#:skip-build? #t
-       #:cargo-inputs
-       (("rust-bindgen" ,rust-bindgen-0.33)
-        ("rust-cc" ,rust-cc-1))))
-    (home-page "https://github.com/rprichard/winpty")
-    (synopsis "Rust winpty bindings")
-    (description "Rust winpty bindings.")
-    (license license:expat)))
-
 (define-public rust-winreg-0.8
   (package
     (name "rust-winreg")