improve ResponseDate parsing

Author: Andrii Osadchuk

api/src/main/java/io/minio/messages/ResponseDate.java

@@ -19,9 +19,6 @@
 import com.fasterxml.jackson.annotation.JsonCreator;
 import io.minio.Time;
 import java.time.ZonedDateTime;
-import java.time.format.DateTimeFormatter;
-import java.time.format.DateTimeParseException;
-import java.util.Locale;
 import org.simpleframework.xml.Root;
 import org.simpleframework.xml.convert.Convert;
 import org.simpleframework.xml.convert.Converter;
@@ -32,9 +29,6 @@
 @Root
 @Convert(ResponseDate.ResponseDateConverter.class)
 public class ResponseDate {
-  public static final DateTimeFormatter MINIO_RESPONSE_DATE_FORMAT =
-      DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH':'mm':'ss'Z'", Locale.US).withZone(Time.UTC);
-
   private ZonedDateTime zonedDateTime;
 
   public ResponseDate() {}
@@ -53,11 +47,7 @@ public String toString() {
 
   @JsonCreator
   public static ResponseDate fromString(String responseDateString) {
-    try {
-      return new ResponseDate(ZonedDateTime.parse(responseDateString, Time.RESPONSE_DATE_FORMAT));
-    } catch (DateTimeParseException e) {
-      return new ResponseDate(ZonedDateTime.parse(responseDateString, MINIO_RESPONSE_DATE_FORMAT));
-    }
+    return new ResponseDate(ZonedDateTime.parse(responseDateString));
   }
 
   /** XML converter class. */