diff --git a/senlin/common/timeutils.py b/senlin/common/timeutils.py
deleted file mode 100644
index c670eb631..000000000
--- a/senlin/common/timeutils.py
+++ /dev/null
@@ -1,62 +0,0 @@
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-"""
-Utilities for handling ISO 8601 duration format.
-"""
-
-import random
-import re
-
-from senlin.common.i18n import _
-
-
-iso_duration_re = re.compile('PT(?:(\d+)H)?(?:(\d+)M)?(?:(\d+)S)?$')
-
-
-def parse_isoduration(duration):
-    """
-    Convert duration in ISO 8601 format to second(s).
-
-    Year, Month, Week, and Day designators are not supported.
-    Example: 'PT12H30M5S'
-    """
-    result = iso_duration_re.match(duration)
-    if not result:
-        raise ValueError(_('Only ISO 8601 duration format of the form '
-                           'PT#H#M#S is supported.'))
-
-    t = 0
-    t += (3600 * int(result.group(1))) if result.group(1) else 0
-    t += (60 * int(result.group(2))) if result.group(2) else 0
-    t += int(result.group(3)) if result.group(3) else 0
-
-    return t
-
-
-def retry_backoff_delay(attempt, scale_factor=1.0, jitter_max=0.0):
-    """
-    Calculate an exponential backoff delay with jitter.
-
-    Delay is calculated as
-    2^attempt + (uniform random from [0,1) * jitter_max)
-
-    :param attempt: The count of the current retry attempt
-    :param scale_factor: Multiplier to scale the exponential delay by
-    :param jitter_max: Maximum of random seconds to add to the delay
-    :returns: Seconds since epoch to wait until
-    """
-    exp = float(2 ** attempt) * float(scale_factor)
-    if jitter_max == 0.0:
-        return exp
-    return exp + random.random() * jitter_max