Description of problem:

Remove 'Attaching the Satellite Infrastructure subscription' step from Capsule install documentation.

As SCA will be enabled by default in Red Hat Satellite 6.16, there is no need to provide steps for attaching subscription to the Capsule server.

Chapter-2: Installing Capsule Server

2.2. Attaching the Satellite Infrastructure subscription

URL: https://content-preview.docs.redhat.com/en/documentation/red_hat_satellite/6.16/html-single/installing_capsule_server/index#attaching-infrastructure-subscription_capsule

Actual behavior:

 SCA will be enabled by default in Red Hat Satellite 6.16, there is no need to provide steps for attaching a subscription to the Capsule server.