Remove webrtc/system_wrappers/interface/scoped_ptr.h

No one uses it anymore; they've all switched to the cooler
webrtc/base/scoped_ptr.h instead.

R=tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/42129004

Cr-Original-Commit-Position: refs/heads/master@{#8569}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 9e5f941ff14f4c18c97bfeb2fde53514a1d8f9c1
4 files changed