Remove Packages Prod Account from codebase

**What happened**:

**What you expected to happen**:

**How to reproduce it (as minimally and precisely as possible)**:

**Anything else we need to know?**:

**Environment**:
- EKS Anywhere Release:
- EKS Distro Release:

The issue body names no files, tests, or entry points and provides no concrete reproduction details. Begin by locating references to the Packages Prod Account in the repository, then clarify the intended scope with maintainers; done means the account is removed without breaking relevant checks or deployments.

Written by the indexing model from the issue text.