gnu: Remove rust-critical-section-0.2.

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

Change-Id: Ib4db4c64809a2acc479fbd03f1319a54cfa6aae8

gnu/packages/crates-io.scm

@@ -14355,30 +14355,6 @@ criterion.")
     (description "This package provides a critical section abstraction.")
     (license (list license:expat license:asl2.0))))
 
-(define-public rust-critical-section-0.2
-  (package
-    (name "rust-critical-section")
-    (version "0.2.5")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (crate-uri "critical-section" version))
-       (file-name (string-append name "-" version ".tar.gz"))
-       (sha256
-        (base32 "0w1xl04q3qn3c67wnbiz6d5dsaqgdimyyxwpcydsvvgnlsjr3q81"))))
-    (build-system cargo-build-system)
-    (arguments
-     `(#:skip-build? #t
-       #:cargo-inputs
-       (("rust-bare-metal" ,rust-bare-metal-1)
-        ("rust-cfg-if" ,rust-cfg-if-1)
-        ("rust-cortex-m" ,rust-cortex-m-0.7)
-        ("rust-riscv" ,rust-riscv-0.7))))
-    (home-page "https://github.com/embassy-rs/critical-section")
-    (synopsis "Critical section abstraction")
-    (description "This package provides a critical section abstraction.")
-    (license (list license:expat license:asl2.0))))
-
 (define-public rust-crossbeam-0.8
   (package
     (name "rust-crossbeam")