Merge #25382: ffmpeg: remove darwin patch

pkgs/development/libraries/ffmpeg/3.3.nix

···
   branch = "3.3";
   sha256 = "1p3brx0qa3i3569zlmcmpbxf17q73nrmbx2vp39s8h77r53qdq11";
   darwinFrameworks = [ Cocoa CoreMedia ];
-  patches = stdenv.lib.optional stdenv.isDarwin ./sdk_detection.patch;
 })

pkgs/development/libraries/ffmpeg/sdk_detection.patch

···
-diff --git a/libavcodec/audiotoolboxdec.c b/libavcodec/audiotoolboxdec.c
---- a/libavcodec/audiotoolboxdec.c
-+++ b/libavcodec/audiotoolboxdec.c
-@@ -32,7 +32,7 @@
- #include "libavutil/opt.h"
- #include "libavutil/log.h"
- 
--#ifndef __MAC_10_11
-+#if __MAC_OS_X_VERSION_MIN_REQUIRED < 101100
- #define kAudioFormatEnhancedAC3 'ec-3'
- #endif
-