Remove SYS_DARWIN preprocessor directive that is just a duplicate of a

gcc-specific directive a few lines below.

Originally committed as revision 10211 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/ppc/gcc_fixes.h

@@ -27,10 +27,6 @@
 #include <altivec.h>
 #endif
 
-#ifdef SYS_DARWIN
-#define REG_v(a) asm ( #a )
-#else
-
 #if (__GNUC__ < 4)
 # define REG_v(a)
 #else
@@ -101,8 +97,6 @@ __ch (__bin_args_eq (vector unsigned int, (a1), vector unsigned int, (a2)), \
 
 #endif
 
-#endif /* SYS_DARWIN */
-
 #ifndef __MWERKS__
 #define const_vector const vector
 #else