remove codecov

[sb-benohe]

Pull requests into cqm-models require the following. Submitter and reviewer should ✅ when done. For items that are not-applicable, note it's not-applicable ("N/A") and ✅.

Submitter:

• This pull request describes why these changes were made.
• Internal ticket for this PR:
• Internal ticket links to this PR
• Code diff has been done and been reviewed
• Tests are included and test edge cases
• Tests have been run locally and pass
• If applicable, the library version number in package.json and cqm-models.gemspec has been updated
• Cqm-execution fixtures have been updated with the update_cqm_execution_fixtures.sh script inside server-scripts using this branch in the cqm-converter

Bonnie Reviewer:

Name:

• Code is maintainable and reusable, reuses existing code and infrastructure where appropriate, and accomplishes the task’s purpose
• The tests appropriately test the new code, including edge cases
• You have tried to break the code

Cypress Reviewer:

Name:

• Code is maintainable and reusable, reuses existing code and infrastructure where appropriate, and accomplishes the task’s purpose
• The tests appropriately test the new code, including edge cases
• You have tried to break the code