delete SQL requirements

EditorialModel/fieldtypes.py

 #-*- coding: utf-8 -*-
 
 from Lodel.utils.mlstring import MlString
-from sqlalchemy import Column, INTEGER, BOOLEAN, VARCHAR
 import datetime
 
 ## get_field_type (Function)
     def sql_column(self):
         return "int(11) NOT NULL"
 
-    def sqlalchemy_args(self):
-        return {'type_': INTEGER, 'nullable': False, 'default': 0}
-
 
 ## EmField_boolean (Class)
 #
     def sql_column(self):
         return "tinyint(1) DEFAULT NULL"
 
-    def sqlalchemy_args(self):
-        return {'type_': BOOLEAN, 'nullable': True, 'default': None}
-
 
 ## EmField_char (Class)
 #
     def sql_column(self):
         return "varchar(250) DEFAULT NULL"
 
-    def sqlalchemy_args(self):
-        return {'type_': VARCHAR(250), 'nullable': True, 'default': None}
-
 
 ## EmField_date (Class)
 #
     def sql_column(self):
         return "varchar(250) DEFAULT NULL"
 
-    def sqlalchemy_args(self):
-        return {'type_': VARCHAR(250), 'nullable': True, 'default': None}
-
 
 ## EmField_mlstring (Class)
 #
     def sql_column(self):
         return "varchar(250) DEFAULT NULL"
 
-    def sqlalchemy_args(self):
-        return {'type_': VARCHAR(250), 'nullable': True, 'default': None}
 
 class EmField_icon(EmFieldType):
     
     def sql_column(self):
         pass
 
-    def sqlalchemy_args(self):
-        return {'type_': INTEGER, 'nullable': True, 'default': None}
 

requirements.txt

 Django==1.7.8
-psycopg2==2.6
-SQLAlchemy==1.0.4
-PyMySQL==0.6.6