gnu: Remove rust-mockall-double-0.2.

* gnu/packages/crates-io.scm (rust-mockall-double-0.2): Delete variable.

gnu/packages/crates-io.scm

@@ -33352,30 +33352,6 @@ IOCP and Async I/O abstractions.")
        #:cargo-development-inputs
        (("rust-rand" ,rust-rand-0.3))))))
 
-(define-public rust-mockall-double-0.2
-  (package
-    (name "rust-mockall-double")
-    (version "0.2.0")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (crate-uri "mockall_double" version))
-       (file-name (string-append name "-" version ".tar.gz"))
-       (sha256
-        (base32 "1ib7ahq98ah13i69ypx6wrkc3ksmjw3jkmh0s2qi7dxj6j6vf99y"))))
-    (build-system cargo-build-system)
-    (arguments
-     `(#:skip-build? #t
-       #:cargo-inputs
-       (("rust-cfg-if" ,rust-cfg-if-1)
-        ("rust-proc-macro2" ,rust-proc-macro2-1)
-        ("rust-quote" ,rust-quote-1)
-        ("rust-syn" ,rust-syn-1))))
-    (home-page "https://github.com/asomers/mockall")
-    (synopsis "Test double adapter for Mockall")
-    (description "This crate tests double adapter for Mockall.")
-    (license (list license:expat license:asl2.0))))
-
 (define-public rust-mockito-0.23
   (package
     (name "rust-mockito")