Remove duplicate call to practracker in pre-commit hook

legacy/trac#30051 (moved) added practracker to the pre-push and pre-commit hooks, but the pre-push hook already calls the pre-commit hook.

I'm just opening this ticket for the bug number, the fix PR is in legacy/trac#30979 (moved).

gaba, I think tooling can be part of sponsor 31?

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