Remove rest proxy

[samvaity]

Description

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All SDK Contribution checklist:

• [ ] The pull request does not introduce [breaking changes]
• [ ] CHANGELOG is updated for new features, bug fixes or other significant changes.
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Testing Guidelines

• [ ] Pull request includes test coverage for the included changes.

[github-actions[bot]]

API Change Check

APIView identified API level changes in this PR and created the following API reviews

io.clientcore:core