fix: removing enterprise-specific code from edx-platform

[kiram15]

Removing enterprise specific code, sister PR to this one in openedx-platform here.

Jira ticket

Description

Describe what this pull request changes, and why. Include implications for people using this change.
Design decisions and their rationales should be documented in the repo (docstring / ADR), per
OEP-19, and can be
linked here.

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• Which edX user roles will this change impact? Common user roles are "Learner", "Course Author",
  "Developer", and "Operator".
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  changes.

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[Copilot]

Pull request overview

This PR removes enterprise-specific user retirement code from openedx-platform, as part of moving that responsibility elsewhere (sister PR in openedx-platform). The enterprise retirement methods (retire_users_data_sharing_consent, retire_sapsf_data_transmission, retire_degreed_data_transmission, retire_user_from_pending_enterprise_customer_user) and their tests are removed. A new test verifies that the USER_RETIRE_LMS_CRITICAL signal is sent with the correct retirement data, allowing enterprise retirement to be handled by signal receivers.

Changes:

• Removed enterprise-specific retirement methods and their invocations from AccountRetirementView.post()
• Removed corresponding enterprise test setup, assertions, and test methods
• Added a new test to verify USER_RETIRE_LMS_CRITICAL signal is sent with retired_username and retired_email

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
openedx/core/djangoapps/user_api/accounts/views.py	Removed enterprise model imports, enterprise retirement method calls, and enterprise retirement method definitions
openedx/core/djangoapps/user_api/accounts/tests/test_retirement_views.py	Removed enterprise imports, test setup, assertion helpers, and test methods; added signal-sending test

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

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