bitbake: persist_data: Drop deprecated/unused function

This class has long since been deprecated and is unused, drop it. I'd love
to get rid of the rest of persist_data but it is still used by the fetcher,
sadly.

(Bitbake rev: 1c574aae8c8ec427f27ab0d68bac9e7483016f18)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/persist_data.py

@@ -18,7 +18,6 @@ import logging
 import os.path
 import sqlite3
 import sys
-import warnings
 from collections import Mapping
 
 sqlversion = sqlite3.sqlite_version_info
@@ -238,55 +237,6 @@ class SQLTable(collections.MutableMapping):
     def has_key(self, key):
         return key in self
 
-
-class PersistData(object):
-    """Deprecated representation of the bitbake persistent data store"""
-    def __init__(self, d):
-        warnings.warn("Use of PersistData is deprecated.  Please use "
-                      "persist(domain, d) instead.",
-                      category=DeprecationWarning,
-                      stacklevel=2)
-
-        self.data = persist(d)
-        logger.debug("Using '%s' as the persistent data cache",
-                     self.data.filename)
-
-    def addDomain(self, domain):
-        """
-        Add a domain (pending deprecation)
-        """
-        return self.data[domain]
-
-    def delDomain(self, domain):
-        """
-        Removes a domain and all the data it contains
-        """
-        del self.data[domain]
-
-    def getKeyValues(self, domain):
-        """
-        Return a list of key + value pairs for a domain
-        """
-        return list(self.data[domain].items())
-
-    def getValue(self, domain, key):
-        """
-        Return the value of a key for a domain
-        """
-        return self.data[domain][key]
-
-    def setValue(self, domain, key, value):
-        """
-        Sets the value of a key for a domain
-        """
-        self.data[domain][key] = value
-
-    def delValue(self, domain, key):
-        """
-        Deletes a key/value pair
-        """
-        del self.data[domain][key]
-
 def persist(domain, d):
     """Convenience factory for SQLTable objects based upon metadata"""
     import bb.utils