lavc: remove disabled FF_API_DATA_POINTERS cruft.

libavcodec/avcodec.h

@@ -854,11 +854,7 @@ enum AVSideDataParamChangeFlags {
  * sizeof(AVFrame) must not be used outside libav*.
  */
 typedef struct AVFrame {
-#if FF_API_DATA_POINTERS
-#define AV_NUM_DATA_POINTERS 4
-#else
 #define AV_NUM_DATA_POINTERS 8
-#endif
     /**
      * pointer to the picture/channel planes.
      * This might be different from the first allocated byte

libavcodec/version.h

@@ -41,9 +41,6 @@
 #ifndef FF_API_REQUEST_CHANNELS
 #define FF_API_REQUEST_CHANNELS (LIBAVCODEC_VERSION_MAJOR < 55)
 #endif
-#ifndef FF_API_DATA_POINTERS
-#define FF_API_DATA_POINTERS (LIBAVCODEC_VERSION_MAJOR < 54)
-#endif
 #ifndef FF_API_OLD_DECODE_AUDIO
 #define FF_API_OLD_DECODE_AUDIO (LIBAVCODEC_VERSION_MAJOR < 55)
 #endif