Remove reflection for removed class, remove deprecated graal-vm option

[Bhashit]

Motivation and Context

Removal of reflection-config for an unused class

The class in question has been removed from the source-code of this repo, but the reflection-config still refers to it. This causes GraalVM to generate an error. The resulting builds behave incorrectly.

Removal of a deprecated GraalVM option

The --allow-incomplete-classpath option is deprecated in GraalVM and generates warnings during builds.

Checklist

• [x ] I have read the CONTRIBUTING document
• [ x] Local run of mvn install succeeds
• [ ] My code follows the code style of this project
• [ ] My change requires a change to the Javadoc documentation
• [ ] I have updated the Javadoc documentation accordingly
• [ ] I have added tests to cover my changes
• [ ] All new and existing tests passed
• [ ] I have added a changelog entry. Adding a new entry must be accomplished by running the scripts/new-change script and following the instructions. Commit the new file created by the script in .changes/next-release with your changes.
• [ ] My change is to implement 1.11 parity feature and I have updated LaunchChangelog

License

• [x ] I confirm that this pull request can be released under the Apache 2 license