remove dateutils related code

Author: guozhenhong

odps-sdk/odps-sdk-core/src/main/java/com/aliyun/odps/commons/proto/ProtobufRecordStreamReader.java

@@ -248,7 +248,7 @@ private Object readField(TypeInfo type) throws IOException {
  case DATETIME:{
  long v = in.readSInt64();
  crc.update(v);
- return shouldTransform ? DateUtils.ms2date(v, DateUtils.LOCAL_CAL) : DateUtils.ms2date(v);
+ return shouldTransform ? DateUtils.ms2date(v, DateUtils.LOCAL_CAL) : new java.util.Date(v);
  }
  case DATE: {
  long v = in.readSInt64();

odps-sdk/odps-sdk-core/src/main/java/com/aliyun/odps/commons/proto/ProtobufRecordStreamWriter.java

@@ -198,7 +198,7 @@ private void writeField(Object v, TypeInfo typeInfo) throws IOException {
 
  Long longValue = null;
  if (!shouldTransform) {
- longValue = DateUtils.date2ms(value);
+ longValue = ((Date) v).getTime();
  } else {
  longValue = DateUtils.date2ms(value, DateUtils.LOCAL_CAL);
  }