5261 libm should stop using synonyms.h

@@ -57,11 +57,10 @@
 / if x and y are finite and x**y = 0    _SVID_libm_err (underflow)
 / if x and y are finite and x**y = inf  _SVID_libm_err (overflow)
 
 #include "libm.h"
 LIBM_ANSI_PRAGMA_WEAK(pow,function)
-#include "libm_synonyms.h"
 #include "libm_protos.h"
 #include "xpg6.h"
 
 #undef fabs