Here's how you can remove a 'Manager' from your account:
1. Go to your Socioh dashboard.
2. Go to the 'Settings' tab from the left column of your dashboard
3. Click on 'Shop Roles'
4. Click on 'Remove' next to the manager you'd like to remove.
And the access will be revoked for that manager. The manager won't be able to access that shop in Socioh dashboard once the access is revoked.