Remove ViEEncoder::ScaleInputImage.

BUG=webrtc:1695
R=asapersson@webrtc.org

Review URL: https://codereview.webrtc.org/1447073002 .

Cr-Commit-Position: refs/heads/master@{#10677}
diff --git a/webrtc/video_engine/vie_encoder.cc b/webrtc/video_engine/vie_encoder.cc
index 1b96c55..206ec02 100644
--- a/webrtc/video_engine/vie_encoder.cc
+++ b/webrtc/video_engine/vie_encoder.cc
@@ -255,19 +255,6 @@
   return 0;
 }
 
-int32_t ViEEncoder::ScaleInputImage(bool enable) {
-  VideoFrameResampling resampling_mode = kFastRescaling;
-  // TODO(mflodman) What?
-  if (enable) {
-    // kInterpolation is currently not supported.
-    LOG_F(LS_ERROR) << "Not supported.";
-    return -1;
-  }
-  vpm_->SetInputFrameResampleMode(resampling_mode);
-
-  return 0;
-}
-
 int ViEEncoder::GetPaddingNeededBps() const {
   int64_t time_of_last_frame_activity_ms;
   int min_transmit_bitrate_bps;
diff --git a/webrtc/video_engine/vie_encoder.h b/webrtc/video_engine/vie_encoder.h
index 96889a2..7d9558c 100644
--- a/webrtc/video_engine/vie_encoder.h
+++ b/webrtc/video_engine/vie_encoder.h
@@ -89,9 +89,6 @@
   int32_t DeRegisterExternalEncoder(uint8_t pl_type);
   int32_t SetEncoder(const VideoCodec& video_codec);
 
-  // Scale or crop/pad image.
-  int32_t ScaleInputImage(bool enable);
-
   // Implementing VideoCaptureCallback.
   void DeliverFrame(VideoFrame video_frame) override;