gnu: Remove rust-qstring-0.7.

* gnu/packages/crates-io.scm (rust-qstring-0.7): Delete variable.

Change-Id: Id2af288d0cb3f6a1aa15ef71f5329f7f3a213047

gnu/packages/crates-io.scm

@@ -49748,27 +49748,6 @@ Python code from a Rust binary is also supported.")
         ("rust-zip" ,rust-zip-0.6))
        #:cargo-development-inputs (("rust-serde-json" ,rust-serde-json-1))))))
 
-(define-public rust-qstring-0.7
-  (package
-    (name "rust-qstring")
-    (version "0.7.2")
-    (source (origin
-              (method url-fetch)
-              (uri (crate-uri "qstring" version))
-              (file-name (string-append name "-" version ".tar.gz"))
-              (sha256
-               (base32
-                "0khhcpwifis87r5chr4jiv3w1bkswcf226c0yjx809pzbzkglr6l"))))
-    (build-system cargo-build-system)
-    (arguments
-     `(#:skip-build? #t
-       #:cargo-inputs
-       (("rust-percent-encoding" ,rust-percent-encoding-2))))
-    (home-page "https://github.com/algesten/qstring")
-    (synopsis "Query string parser")
-    (description "This package provides query string parser.")
-    (license license:expat)))
-
 (define-public rust-quantiles-0.7
   (package
     (name "rust-quantiles")