Reuse ArrayUtils.EMPTY_BYTE_ARRAY in test

Author: Gary Gregory

src/test/java/org/apache/commons/io/input/MemoryMappedFileInputStreamTest.java

@@ -18,6 +18,7 @@
 
 import static org.junit.jupiter.api.Assertions.assertArrayEquals;
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.apache.commons.lang3.ArrayUtils.EMPTY_BYTE_ARRAY;
 
 import java.io.IOException;
 import java.io.InputStream;
@@ -39,8 +40,6 @@
  */
 public class MemoryMappedFileInputStreamTest {
 
-    private static final byte[] EMPTY_BYTE_ARRAY = new byte[0];
-
     @TempDir
     Path tempDir;