POTEL 37b - No longer selectively copy OTel span attributes

[adinauer]

:scroll: Description

We're copying all of attribues as of (https://github.com/getsentry/sentry-java/pull/3593). This means we no longer need to selectively copy some of them.

:bulb: Motivation and Context

Remove unnecessary code.

:green_heart: How did you test it?

:pencil: Checklist

• [ ] I reviewed the submitted code.
• [ ] I added tests to verify the changes.
• [ ] No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• [ ] I updated the docs if needed.
• [ ] Review from the native team if needed.
• [ ] No breaking change or entry added to the changelog.
• [ ] No breaking change for hybrid SDKs or communicated to hybrid SDKs.

:crystal_ball: Next steps