libxbps: xbps_yesno/noyes() are only used in xbps-bin(8), remove from API.

include/xbps_api.h

@@ -51,7 +51,7 @@
  * @def XBPS_RELVER
  * Current library release date.
  */
-#define XBPS_RELVER		"20110118"
+#define XBPS_RELVER		"20110119"
 
 /** 
  * @def XBPS_META_PATH
@@ -1081,9 +1081,6 @@ void xbps_set_flags(int flags);
  */
 int xbps_get_flags(void);
 
-bool xbps_yesno(const char *, ...);
-bool xbps_noyes(const char *, ...);
-
 /*@}*/
 
 __END_DECLS