Remove unneeded mesh_inertia_calculation test expectations

[scpeters]

🦟 Bug fix

Follow-up to #2777.

Summary

The mesh_inertia_calculation test was updated in #2777 (thanks to @gabrielfpacheco for the contribution), and I'm addressing some unresolved comments here by removing unneeded test expectations.

• Fix initialization of world components when enabling velocity checks #2777 (comment)
• Fix initialization of world components when enabling velocity checks #2777 (comment)
• Fix initialization of world components when enabling velocity checks #2777 (comment)

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
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