Dev story for PD-1469.

When the ROSA gettings started page (PD-1414) was created, there was no equivalent page on AWS' site to help users with ROSA prerequisites.

As of Jan 2023, there is now a "Verify ROSA prerequisites" page on AWS' console that checks several prerequisites: https://console.aws.amazon.com/rosa/home#/get-started

There is now duplication in the prerequisites steps between the two pages for users that are linked to the Red Hat ROSA getting started page from the AWS getting started page, including:

• Step 5: Quota check
• Step 3: ELB service-linked role

Acceptance Criteria

• Remove Steps 3 & 5.