Revert of Add CreateWindowCapturer() and CreateScreenCapturer() in DesktopCapturer

webrtc/modules/desktop_capture/window_capturer_x11.cc

Index: webrtc/modules/desktop_capture/window_capturer_x11.cc
diff --git a/webrtc/modules/desktop_capture/window_capturer_x11.cc b/webrtc/modules/desktop_capture/window_capturer_x11.cc
index 11a27d52c2f81d559b4013593eaf44c000dd0b74..2e2ce9bba991f447fc5af36cdc32403b1ce862dd 100644
--- a/webrtc/modules/desktop_capture/window_capturer_x11.cc
+++ b/webrtc/modules/desktop_capture/window_capturer_x11.cc
@@ -430,12 +430,4 @@
   return new WindowCapturerLinux(options);
 }
 
-// static
-std::unique_ptr<DesktopCapturer> DesktopCapturer::CreateRawWindowCapturer(
-    const DesktopCaptureOptions& options) {
-  if (!options.x_display())
-    return nullptr;
-  return std::unique_ptr<DesktopCapturer>(new WindowCapturerLinux(options));
-}
-
 }  // namespace webrtc