modify code on class

Author: 左程云

src/topinterviewquestions/Problem_0022_GenerateParentheses.java

@@ -17,7 +17,6 @@ public static List<String> generateParenthesis(int n) {
 	// 0 1 2 3 4 5
 	// path[0...index-1]决定已经做完了
 	// index位置上，( )
-	// leftNum
 	public static void process(char[] path, int index, int leftMinusRight, int leftRest, List<String> ans) {
 		if (index == path.length) {
 			ans.add(String.valueOf(path));