[Zuora EoA fields] Remove fields from Zuora

Problem

We no longer need the eoa_starter_bronze_offer_accepted__c and ExcludeFromEoaStarterBronzeOffer__c fields. Let's remove them.

This will be a multistep process:

1. [Zuora EoA fields] Remove EoA fields from Zuora... (#12564)
2. [Zuora EoA fields] Exclude fields from Zuora sc... (#12565)
3. Remove field from Zuora 👈 this issue
4. [Zuora EoA fields] Regenerate Zuora schema in Cdot (#12567)

Proposal

Remove these fields from Zuora - reach out to EntApps for removing the field

Next steps (if any)

[Zuora EoA fields] Regenerate Zuora schema in Cdot (#12567)