ident: Remove the unused function id_mangle_u().

include/libfirm/ident.h

@@ -61,9 +61,6 @@ FIRM_API const char *get_id_str(ident *id);
  */
 FIRM_API ident *id_unique(const char *tag);
 
-/** mangle underscore: Returns a new ident that represents first_scnd. */
-FIRM_API ident *id_mangle_u(ident *first, ident* scnd);
-
 /** Returns a new ident that represents 'prefixscndsuffix'. */
 FIRM_API ident *id_mangle3(const char *prefix, ident *middle,
                            const char *suffix);

ir/ident/mangle.c

@@ -56,12 +56,6 @@ static ident *id_mangle_3(ident *first, char c, ident *scnd)
 	return new_ident_from_obst(&mangle_obst);
 }
 
-/* Returns a new ident that represents first_scnd. */
-ident *id_mangle_u(ident *first, ident* scnd)
-{
-	return id_mangle_3(first, '_', scnd);
-}
-
 void firm_init_mangle(void)
 {
 	obstack_init(&mangle_obst);