[LEET-2022] refactor 2022

Author: fishercoder1534

src/main/java/com/fishercoder/solutions/thirdthousand/_2022.java

@@ -3,8 +3,7 @@
 public class _2022 {
     public static class Solution1 {
         public int[][] construct2DArray(int[] original, int m, int n) {
-            int size = original.length;
-            if (m * n != size) {
+            if (m * n != original.length) {
                 return new int[][]{};
             }
             int[][] ans = new int[m][n];