quicktime: remove deprecate module

from Apple website:

"Deprecated in OS X v10.9. Use AVFoundation.framework and AVKit.framework
 instead."

Ref: https://developer.apple.com/library/content/documentation/MacOSX/Conceptual/OSX_Technology_Overview/SystemFrameworks/SystemFrameworks.html

please use qtcapture or avcapture modules instead

README.md

@@ -106,7 +106,7 @@ Distributed under BSD license
   - FFmpeg/libav libavformat/avdevice input
   - Cairo video-source test module
   - Direct Show video-source
-  - MacOSX QTcapture/quicktime video-source
+  - MacOSX QTcapture/AVCapture video-source
   - RST media player
   - Linux V4L/V4L2 video-source
   - X11 grabber video-source
@@ -272,7 +272,6 @@ portaudio     Portaudio driver
 pulse         Pulseaudio driver
 presence      Presence module
 qtcapture     Apple QTCapture video source driver
-quicktime     Apple Quicktime video source driver (deprecated)
 rst           Radio streamer using mpg123
 sdl           Simple DirectMedia Layer (SDL) video output driver
 sdl2          Simple DirectMedia Layer v2 (SDL2) video output driver