5261 libm should stop using synonyms.h

@@ -28,11 +28,10 @@
 
         .file   "copysignf.s"
 
 #include "libm.h"
 LIBM_ANSI_PRAGMA_WEAK(copysignf,function)
-#include "libm_synonyms.h"
 
         ENTRY(copysignf)
         movl    4(%esp),%eax            / eax <-- x
         movl    8(%esp),%ecx            / ecx <-- y
         andl    $0x7fffffff,%eax        / eax <-- abs(x)