gitlab: remove rustc runtime dependency from gitlab-glfm-markdown

pkgs/applications/version-management/gitlab/default.nix

@@ -61,12 +61,17 @@ let
             rustPlatform.bindgenHook
           ];
 
+          disallowedReferences = [
+            rustc.unwrapped
+          ];
+
           preInstall = ''
             export CARGO_HOME="$PWD/../.cargo/"
           '';
 
           postInstall = ''
             mv -v $GEM_HOME/gems/${attrs.gemName}-${attrs.version}/lib/{glfm_markdown/glfm_markdown.so,}
+            find $out -type f -name .rustc_info.json -delete
           '';
         };
       };