gnu: Remove rust-gettext-rs-0.6.

* gnu/packages/crates-io.scm (rust-gettext-rs-0.6): Delete variable.

gnu/packages/crates-io.scm

@@ -25341,27 +25341,6 @@ getters and setters on fields.")
     (description "This package provides GNU Gettext FFI bindings for Rust.")
     (license license:expat)))
 
-(define-public rust-gettext-rs-0.6
-  (package
-    (inherit rust-gettext-rs-0.7)
-    (name "rust-gettext-rs")
-    (version "0.6.0")
-    (source
-      (origin
-        (method url-fetch)
-        (uri (crate-uri "gettext-rs" version))
-        (file-name
-         (string-append name "-" version ".tar.gz"))
-        (sha256
-         (base32
-          "040nizg9l5ap2vqgq4d2va2hi6cpykj46g8q1z9xv393vjlygx1x"))))
-    (arguments
-     `(#:cargo-inputs
-       (("rust-gettext-sys" ,rust-gettext-sys-0.21)
-        ("rust-locale-config" ,rust-locale-config-0.3))
-       #:cargo-development-inputs
-       (("rust-lazy-static" ,rust-lazy-static-1))))))
-
 (define-public rust-gettext-rs-0.5
   (package
     (inherit rust-gettext-rs-0.7)