[DO NOT MERGE] C1 - Remove todo comments from LineaRollup.sol

[kyzooghost]

Removed TODO comment in LineaRollup.sol

This PR implements issue(s) #

Checklist

• I wrote new tests for my new core changes.
• I have successfully ran tests, style checker and build against my new changes locally.
• I have informed the team of any breaking changes if there are any.

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Note

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