cleanup: removed pycrypto code from db schema, it's unused anyway

rhodecode/lib/dbmigrate/schema/db_3_0_0_1.py

@@ -38,8 +38,6 b' from sqlalchemy.orm import relationship,'
 from sqlalchemy.exc import OperationalError
 from beaker.cache import cache_region, region_invalidate
 from webob.exc import HTTPNotFound
-from Crypto.Cipher import AES
-from Crypto import Random
 from zope.cachedescriptors.property import Lazy as LazyProperty
 
 from rhodecode.translation import _