clean up imports

Author: JooHyukKim

ion/src/test/java/com/fasterxml/jackson/dataformat/ion/jsr310/IonTimestampZonedDateTimeDeserializerTest.java

@@ -13,8 +13,8 @@
 import com.fasterxml.jackson.dataformat.ion.IonObjectMapper;
 
 import static java.time.ZoneOffset.UTC;
-
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
 
 public class IonTimestampZonedDateTimeDeserializerTest {
 

ion/src/test/java/com/fasterxml/jackson/dataformat/ion/polymorphism/SerializationAnnotationsTest.java

@@ -12,7 +12,8 @@
 import com.fasterxml.jackson.dataformat.ion.IonGenerator;
 import com.fasterxml.jackson.dataformat.ion.IonObjectMapper;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
 
 public class SerializationAnnotationsTest {