Remove unused code
Remove unused code

Summary: `video_end_time` was never used in the code, so I was able to remove the whole try/except block.

Reviewed By: YanNoun

Differential Revision: D35283729

fbshipit-source-id: c122354379058727a1e86dccee65549cc180b6ea

mapillary/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM,mapillary/OpenSfM