CI: Remove unnecessary step in aio

Author: markgoddard

.github/workflows/stackhpc-all-in-one.yml

@@ -137,17 +137,6 @@ jobs:
         run: ssh-keygen -f id_rsa -N ''
         working-directory: ${{ github.workspace }}/terraform/aio
 
-      # TODO: Remove the following step in Antelope.
-      # NOTE: In Ansible 2.10 and lower the synchronize module used in the
-      # ansible/diagnostics.yml playbook does not respect SSH connection
-      # variables. This may result in Permission Denied issues if using an SSH
-      # key that is not in ~/.ssh.
-      - name: Copy SSH keypair to .ssh/
-        run: |
-          install -d ~/.ssh -m 700 &&
-          cp id_rsa* ~/.ssh/
-        working-directory: ${{ github.workspace }}/terraform/aio
-
       - name: Generate clouds.yaml
         run: |
           cat << EOF > clouds.yaml