chore: remove example from velocity

[sobolk]

Description of changes

This resolves dependabot alert against packages/amplify-velocity-template/examples/package.json .

We address this by deleting packages/amplify-velocity-template/examples . This code is not used.

Some context:

1. packages/amplify-velocity-template is a copy of open source library. It was copied verbatim here feat: add support for testing AppSync API locally #1893 including examples.
2. We're using it only here

   amplify-cli/packages/amplify-appsync-simulator/src/velocity/index.ts

   Line 2 in 2124c2a

   import { Compile, parse } from 'amplify-velocity-template';

3. There's no evidence that our code uses velocity examples.

Description of how you validated changes

Checklist

• PR description included
• yarn test passes
• Tests are changed or added
• Relevant documentation is changed or added (and PR referenced)
• New AWS SDK calls or CloudFormation actions have been added to relevant test and service IAM policies
• Pull request labels are added

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.