Summary:
Cleans up trailing whitespaces and newlines at end of file.
Linter will be enabled in a followup

Test Plan: N/A

Reviewers: zasgar, michelle, oazizi, #third_party_approvers

Reviewed By: zasgar, oazizi, #third_party_approvers

Differential Revision: https://phab.corp.pixielabs.ai/D9751

GitOrigin-RevId: 804363597ea2d968615e14c72db4f8a8b51d0865