Revert of Add DesktopCapturer GetSourceList SelectSource FocusOnSelectedSource functions

webrtc/modules/desktop_capture/BUILD.gn

Index: webrtc/modules/desktop_capture/BUILD.gn
diff --git a/webrtc/modules/desktop_capture/BUILD.gn b/webrtc/modules/desktop_capture/BUILD.gn
index 8c59cdbb29e4daa3ed1f50c7e637c95b2e1ef8f4..19bc2379c028fc859e5f55f54682d1c578153c37 100644
--- a/webrtc/modules/desktop_capture/BUILD.gn
+++ b/webrtc/modules/desktop_capture/BUILD.gn
@@ -41,7 +41,6 @@
     "desktop_and_cursor_composer.h",
     "desktop_capture_options.cc",
     "desktop_capture_options.h",
-    "desktop_capturer.cc",
     "desktop_capturer.h",
     "desktop_frame_win.cc",
     "desktop_frame_win.h",
@@ -61,7 +60,6 @@
     "mouse_cursor_monitor_mac.mm",
     "mouse_cursor_monitor_win.cc",
     "screen_capture_frame_queue.h",
-    "screen_capturer.cc",
     "screen_capturer.h",
     "screen_capturer_helper.cc",
     "screen_capturer_helper.h",
@@ -100,7 +98,6 @@
     "win/screen_capturer_win_magnifier.h",
     "win/window_capture_utils.cc",
     "win/window_capture_utils.h",
-    "window_capturer.cc",
     "window_capturer.h",
     "window_capturer_mac.mm",
     "window_capturer_win.cc",