Summary:
Ref T13195. See PHI842. Alternative to D19638.
Instead of doing all the stuff in D19638, //just// remove the `rebuild_summaries.php` script. This script is outdated, copy/pastes the rebuild logic, and doesn't understand unreachable commits.
If we had some use for it it should move to `bin/repository rebuild-summary ...` or similar, but it's not clear there's any use for it. The incremental summary rebuilds seem to work fine as-is.
Test Plan: Grepped for callers or documentation referencing this script, found nothing.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T13195
Differential Revision: https://secure.phabricator.com/D19643
7967fab5cc