remove session model loading

Author: shwetachari

db/sql/index.js

@@ -24,7 +24,6 @@ sequelize.authenticate()
 module.exports = sequelize;
 
 const Course = require('./models/Course.js');
-const Session = require('./models/Session.js');
 const User = require('./models/User.js');
 const UserToFriends = require('./models/UserToFriends.js');
 const UserToCourse = require('./models/UserToCourse.js');