[FIX]: Remove Duplicate Time-Zone Entries in Language & Region

[theijhay]

Description

On the Language & Region settings page of the Admin Dashboard, the Time-Zone dropdown contains duplicate entries for certain time zones, which should be removed to avoid confusion.

Acceptance Criteria

• No duplicate time zone entries appear in the dropdown.
• Each time zone is represented only once.
• The list remains comprehensive and accurate.

Purpose

• This helps eliminate confusion among users trying to select a certain time zone.

Requirement

• Implement logic to remove duplicate time zone entries from the dropdown.
• Ensure each time zone is listed only once.

Expected Outcome

• The dropdown should display unique time zone entries.

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