5261 libm should stop using synonyms.h

@@ -24,12 +24,10 @@
 /*
  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#pragma weak exp10 = __exp10
-
 /* INDENT OFF */
 /*
  * exp10(x)
  * Code by K.C. Ng for SUN 4.0 libm.
  * Method :