refactor(datax): hdfs_writer 删除 kerberosPrincipal 硬编码

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

dw_base/datax/plugins/writer/hdfs_writer.py

@@ -48,7 +48,6 @@ class HDFSWriter(Writer):
             self.config_parser.get(self.plugin_type, HDFS_WRITER_PARAMETER_WRITE_MODE) or 'append'
         self.parameter[HDFS_WRITER_PARAMETER_FIELD_DELIMITER] = \
             self.config_parser.get(self.plugin_type, HDFS_WRITER_PARAMETER_FIELD_DELIMITER).replace("\\t", "\t") or '\t'
-        self.parameter['kerberosPrincipal'] = 'hdfs@LIXIAOYUN.COM'
         self.get_file_name()
 
     def get_file_name(self):