Update expedition_export.md to remove sonicwall section

[lychiang]

Remove Sonicwall Instructions per GCS

Description

Remove Sonicwall Section

Motivation and Context

Requested by GCS

How Has This Been Tested?

Testing

Screenshots (if appropriate)

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)

Checklist

• [x ] I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• [ x] I have added tests to cover my changes if appropriate.
• [x ] All new and existing tests passed.

[github-actions]

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