Remove unused file bloomfilter.py

The file is not used.

Change-Id: I6e28b0ace8991037a107fcf31d893f0db1815f4e

dragonflow/utils/bloomfilter.py

@@ -1,60 +0,0 @@
-# Copyright (c) 2015 OpenStack Foundation.
-# All Rights Reserved.
-#
-#    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.
-import random
-
-
-class BloomFilter(object):
-    def __init__(self, num_bytes, num_probes, iterable=()):
-        """Bloom filter implementation
-
-        Example: Check if number in set
-
-        >>> bf = BloomFilter(8, 2, (123, 321, 213, 3123))
-        >>> 123 in bf
-        True
-        >>> 456 in bf
-        False
-
-        :param num_bytes: Number of bytes in the filter
-        :type num_bytes: int
-        :param num_probes: Number of bloom filter probes
-        :type num_probes: int
-        :param iterable: Iterable set of items to create the filter from
-        """
-        self._array = bytearray(num_bytes)
-        self._num_probes = num_probes
-        self._num_bits = num_bytes * 8
-        self.update(iterable)
-
-    @property
-    def array(self):
-        return self._array
-
-    def _get_probes(self, key):
-        rdm = random.Random(key).random
-        return (int(rdm() * self._num_bits)
-                for _probe in range(self._num_probes))
-
-    def update(self, keys):
-        """Add keys to the current filter
-        :param keys: iterable set of keys
-        """
-        for key in keys:
-            for i in self._get_probes(key):
-                self._array[i // 8] |= 2 ** (i % 8)
-
-    def __contains__(self, key):
-        return all(self._array[i // 8] & (2 ** (i % 8))
-                   for i in self._get_probes(key))