Remove deprecation `DEPPS3`: Config option `enforcePrivateUsers` defaults to `true`

[mtrezza]

New Feature / Enhancement Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.

Current Limitation

Deprecation to be removed in Parse Sever 6:

• DEPPS3: Config option enforcePrivateUsers defaults to true

Feature / Enhancement Description

Remove deprecation, see list.

Example Use Case

n/a

Alternatives / Workarounds

n/a

[parse-github-assistant]

Thanks for opening this issue!

• 🎉 We are excited about your ideas for improvement!

[parseplatformorg]

🎉 This change has been released in version 6.0.0-alpha.9

[parse-github-assistant]

The label state:released-alpha cannot be used in combination with state:breaking.

[parse-github-assistant]

The label state:duplicate cannot be used in combination with state:breaking.