Deletion of a Django migration file

I changed the migration system, so this file is unecessary at this stage
and eveyerything has been put back into a single migration file called
`0001_initial.py`.
Signed-off-by: Matthieu Berjon <matthieu.berjon@inria.fr>

django/poc/migrations/0002_auto_20180316_1321.py

-# -*- coding: utf-8 -*-
-# Generated by Django 1.11 on 2018-03-16 13:21
-from __future__ import unicode_literals
-
-from django.db import migrations, models
-import django.db.models.deletion
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('poc', '0001_initial'),
-    ]
-
-    operations = [
-        migrations.AlterField(
-            model_name='quotas',
-            name='user_id',
-            field=models.IntegerField(db_column='user_id'),
-        ),
-        migrations.RenameField(
-            model_name='quotas',
-            old_name='user_id',
-            new_name='user',
-        ),
-        migrations.AlterField(
-            model_name='quotas',
-            name='user',
-            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='poc.Users'),
-        ),
-    ]