ci(manual-detached-test): drop no-longer-needed setting

We now limit access to the actor by default, iff the actor has a public
SSH key registered in their GitHub profile.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

.github/workflows/manual-detached-test.yml

@@ -8,7 +8,6 @@ jobs:
       - uses: actions/checkout@v4
       - uses: ./detached
         with:
-          limit-access-to-actor: true
           connect-timeout-seconds: 60
       - run: |
           echo "A busy loop"