5261 libm should stop using synonyms.h

@@ -28,11 +28,10 @@
 
         .file "expm1l.s"
 
 #include "libm.h"
 LIBM_ANSI_PRAGMA_WEAK(expm1l,function)
-#include "libm_synonyms.h"
 
         .data
         .align  4
 ln2_hi: .long   0xd1d00000, 0xb17217f7, 0x00003ffe
 ln2_lo: .long   0x4c67fc0d, 0x8654361c, 0x0000bfce