Remove VertexAI from the package list for now

[a-maurice]

Description

Provide details of the change, and generalize the change in the PR title above.

The package process is making an empty unity package because of this, so remove it for now.

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Testing

Describe how you've tested these changes.

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Type of Change

Place an x the applicable box:

• Bug fix. Add the issue # below if applicable.
• New feature. A non-breaking change which adds functionality.
• Other, such as a build process or documentation change.

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