5261 libm should stop using synonyms.h

@@ -31,11 +31,10 @@
 #include "libm.h"
 LIBM_ANSI_PRAGMA_WEAK(nextafter,function)
         .weak _nextafter
         .type _nextafter,@function
 _nextafter      = __nextafter
-#include "libm_synonyms.h"
 #include "libm_protos.h"
 
         .data
         .align  8
 Fmin:   .long   0x1,0x0