Update .env.example

[majdialharbi989]

Motivation and Context

How Has This Been Tested?

Breaking Changes

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have added or updated documentation as needed

Additional context

[a-akimov]

Hi @majdialharbi989 , thank you for your PR.

1. Could you please remove OPENAI_API_KEY, as it's not used anywhere in these projects at the moment.
2. Please explain the motivation for this change, as it's currently missing in the description; why you believe it's better to have a specific placeholder value instead of keeping it empty.

[jonathanhefner]

Closing due to lack of response, but I can re-open if we decide it is a worthwhile change.