nix-shell: Disable a failing test

This test is obsolete, the default environment includes gcc now.

Signed-off-by: Gergely Nagy <me@gergo.csillger.hu>

.forgejo/workflows/nix-shell.yaml

@@ -23,19 +23,6 @@ jobs:
           run: |
             hello
 
-      - name: ensure we're not in a dev environment
-        uses: ./shell
-        with:
-          flake: ./shell/test
-          package: "hello"
-          run: |
-            set -x
-
-            # if we have gcc installed, we're in a dev environment.
-            # we don't want to be in a dev environment
-            type -p gcc >/dev/null && exit 1
-            hello
-
       - name: no commands should still work
         uses: ./shell
         with: