Remove codeowners

[zastrowm]

Description

Remove codeowners to avoid the code owners from being added to every PR. We can re-add once we have fine-grained owners but right now we're getting more notifications than we need.

This is not required for PR approvers, since only members who have write or greater can approver PRs:

Related Issues

N/A

Documentation PR

N/A

Type of Change

• Other (please describe): Repo maintenance

Testing

[How have you tested the change?]

• hatch fmt --linter
• hatch fmt --formatter
• hatch test --all
• Verify that the changes do not break functionality or introduce warnings in consuming repositories: agents-docs, agents-tools, agents-cli

Checklist

• I have read the CONTRIBUTING document
• I have added tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature
• My changes generate no new warnings
• Any dependent changes have been merged and published

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[mehtarac]

LGTM