5261 libm should stop using synonyms.h

@@ -53,11 +53,10 @@
 / -x ** y (an integer) is (-1)**(y) * (+x)**(y)
 / x ** y (x negative & y not integer) is NaN (i flag)
 
 #include "libm.h"
 LIBM_ANSI_PRAGMA_WEAK(powl,function)
-#include "libm_synonyms.h"
 #include "xpg6.h"
 
 #undef fabs
 
         .data