Maint: remove unused RHOBS_URL variable

[typeid]

What type of PR is this?

cleanup

What this PR does / why we need it?

This PR removes the unused RHOBS_URL variable from the MCC template.

Which Jira/Github issue(s) this PR fixes?

Fixes #

Special notes for your reviewer:

Pre-checks (if applicable):

• [ ] Tested latest changes against a cluster

• [ ] Included documentation changes with PR

• [ ] If this is a new object that is not intended for the FedRAMP environment (if unsure, please reach out to team FedRAMP), please exclude it with:

  matchExpressions:
  - key: api.openshift.com/fedramp
    operator: NotIn
    values: ["true"]
  

[openshift-bot]

Issues go stale after 90d of inactivity.

Mark the issue as fresh by commenting /remove-lifecycle stale. Stale issues rot after an additional 30d of inactivity and eventually close. Exclude this issue from closing by commenting /lifecycle frozen.

If this issue is safe to close now please do so with /close.

/lifecycle stale

[iamkirkbater]

/lgtm

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: iamkirkbater, patjlm, typeid

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[openshift-ci[bot]]

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