Need to remove segment_start_times, segment_end_times, and segment_numbers since we'll no longer have this information soon.

They're primarily used for file uploads. We'll replace them with:

• make the following assumptions
  • route starts at segment 0
  • segments are 60s
  • segments aren't missing in the middle of the route
• add an "Upload all for route" button that requests uploads for range(0, max_seg_number+1). this is a fallback for cases where the assumptions don't hold true

With those assumptions, the file upload should be mostly unaffected.