Remove unused code in storage.

- stats() on claims;
 - constants not handled by storage.

Change-Id: Ia70193c345e1ba515bdf0cf2a35c976ae5706668
Implements: blueprint storage-base

marconi/storage/base.py

@@ -17,12 +17,6 @@
 
 import abc
 
-# Seconds
-MIN_TTL = 60
-
-# Seconds (14 days)
-MAX_TTL = 1209600
-
 
 class DriverBase:
     __metaclass__ = abc.ABCMeta
@@ -291,17 +285,3 @@ class ClaimBase(ControllerBase):
         :param tenant: Tenant id
         """
         raise NotImplementedError
-
-    @abc.abstractmethod
-    def stats(self, queue, claim_id, tenant=None):
-        """
-        Base method for claim stats.
-
-        :param queue: Name of the queue this
-            claim belongs to.
-        :param claim_id: Claim to be deleted
-        :param tenant: Tenant id
-        :returns: Dictionary with the
-            queue stats
-        """
-        raise NotImplementedError

marconi/storage/mongodb/controllers.py

@@ -443,6 +443,3 @@ class ClaimController(storage.ClaimBase):
     def delete(self, queue, claim_id, tenant=None):
         msg_ctrl = self.driver.message_controller
         msg_ctrl.unclaim(claim_id)
-
-    def stats(self, queue, claim_id, tenant=None):
-        raise NotImplementedError

marconi/storage/sqlite/controllers.py

@@ -350,9 +350,6 @@ class Claim(base.ClaimBase):
         except _BadID:
             pass
 
-    def stats(self, queue, claim_id, tenant=None):
-        raise NotImplementedError
-
 
 class _NoResult(Exception):
     pass