Delete deprecated versions of Copy, ScaleFrom and CropAndScaleFrom.
Delete deprecated versions of Copy, ScaleFrom and CropAndScaleFrom.

BUG=webrtc:6672

Review-Url: https://codereview.webrtc.org/2528143002
Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#15317}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: f15a2c51939e9ff401ef45fab1335253d4c74ef3

Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk