watchman: remove old getdeps.py
watchman: remove old getdeps.py

Summary: This was replaced with the newer getdeps script a while back

Reviewed By: genevievehelsel

Differential Revision: D24028224

fbshipit-source-id: 9dad7db5814bd1d3e4b3a1e263e0695bcf60ff7d

facebook/watchman,facebook/watchman,facebook/watchman,nodakai/watchman,facebook/watchman,nodakai/watchman,nodakai/watchman,facebook/watchman,nodakai/watchman,facebook/watchman,nodakai/watchman,facebook/watchman,nodakai/watchman,nodakai/watchman,nodakai/watchman,facebook/watchman,nodakai/watchman,facebook/watchman