Don't link against ign-cmake utilities

[chapulina]

🦟 Bug fix

Summary

We stopped using utilities in #55, so we don't need to link against it anymore.

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
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