diff --git a/monasca_transform/transform/transform_utils.py b/monasca_transform/transform/transform_utils.py
index a23c892..5e9bb43 100644
--- a/monasca_transform/transform/transform_utils.py
+++ b/monasca_transform/transform/transform_utils.py
@@ -12,8 +12,6 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import logging
-
 from pyspark.sql import SQLContext
 from pyspark.sql.types import ArrayType
 from pyspark.sql.types import DoubleType
@@ -22,8 +20,6 @@ from pyspark.sql.types import StringType
 from pyspark.sql.types import StructField
 from pyspark.sql.types import StructType
 
-LOG = logging.getLogger(__name__)
-
 
 class TransformUtils(object):
     """utility methods for different kinds of data."""