// trimTime trims the Tile down to at most the last config.MAX_CLUSTER_COMMITS
// commits, less if there aren't that many commits in the Tile.
func trimTile(tile *tiling.Tile) (*tiling.Tile, error) {
end := tile.LastCommitIndex() + 1
begin := end - config.MAX_CLUSTER_COMMITS
if begin < 0 {
begin = 0
}
return tile.Trim(begin, end)
}
