Remove declaration of unused parameter to avoid a warning.

libwccl/values/matchdata.h

@@ -37,14 +37,14 @@ public:
 	/**
 	 * Getter for a submatch at given index (indexing starts from 1).
 	 */
-	virtual const boost::shared_ptr<const Match>& submatch(size_t idx) const {
+	virtual const boost::shared_ptr<const Match>& submatch(size_t) const {
 		throw WcclError("Getting a submatch is possible only for a MatchVector.");
 	}
 
 	/**
 	 * Getter for a submatch at given index (indexing starts from 1).
 	 */
-	virtual const boost::shared_ptr<Match>& submatch(size_t idx) {
+	virtual const boost::shared_ptr<Match>& submatch(size_t) {
 		throw WcclError("Getting a submatch is possible only for a MatchVector.");
 	}