Remove the subject claim addition steps from the docs

[Akila94]

Affected OB version:

OB Accelerator (OB3)

This change only affects when the accelerators are used with IS 6 or above versions.

Affected OB specifications:

All specs

Existing pages to be updated:

• Remove the 14th step of the Subscribing to Self-Care Portal API topic of this page.

Related Issue: #915