style: enable HideUtilityClassConstructor in checkstyle (#5147)

src/test/java/com/thealgorithms/others/ArrayRightRotation.java

@@ -1,6 +1,8 @@
 package com.thealgorithms.others;
 
-public class ArrayRightRotation {
+public final class ArrayRightRotation {
+    private ArrayRightRotation() {
+    }
     public static int[] rotateRight(int[] arr, int k) {
         if (arr == null || arr.length == 0 || k < 0) {
             throw new IllegalArgumentException("Invalid input");

src/test/java/com/thealgorithms/others/CRC16Test.java

@@ -5,9 +5,6 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 import org.junit.jupiter.api.Test;
 
 class CRC16Test {
-
-    CRC16 crc = new CRC16();
-
     @Test
     void testCRC16() {
         // given