Fixed sonar

Author: javadev

src/test/java/com/github/underscore/UnderscoreTest.java

@@ -40,7 +40,6 @@
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.InputStream;
-import java.io.OutputStream;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;