Remove one more forgotten instance of USE_HIGHPRECISION indirection.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@16597 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/mpc.h

@@ -32,10 +32,6 @@
 #include "avcodec.h"
 #include "bitstream.h"
 #include "dsputil.h"
-
-#if CONFIG_MPEGAUDIO_HP
-#define USE_HIGHPRECISION
-#endif
 #include "mpegaudio.h"
 
 #include "mpcdata.h"