Remove unused version.py script.
Remove unused version.py script.

This should have been removed back in
https://webrtc-codereview.appspot.com/4899004

TBR=andrew@webrtc.org
BUG=

Review URL: https://webrtc-codereview.appspot.com/48629004

Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#8826}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: ee0c5af3149617a3482f4b6b750b0f62c592c7b1

sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc