Update MRUCacheTest.java

Author: Hardvan

src/test/java/com/thealgorithms/datastructures/caches/MRUCacheTest.java

@@ -1,9 +1,7 @@
 package com.thealgorithms.datastructures.caches;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertNull;
-import static org.junit.jupiter.api.Assertions.fail;
 
 import org.junit.jupiter.api.Test;