Removed unused import.

Author: Ananya2

src/test/java/com/microsoft/sqlserver/jdbc/unit/statement/StatementTest.java

@@ -7,10 +7,8 @@
 import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.fail;
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
-import java.io.InputStream;
 import java.io.StringReader;
 import java.math.BigDecimal;
 import java.math.RoundingMode;