🗃️(teams) remove the slug field in DB

This commit removes the slug field from
the database, now the nullable migration is in
production and the field has been remove from
the code deployed.

FIXES #505

src/backend/core/migrations/0004_remove_team_slug.py

@@ -0,0 +1,17 @@
+# Generated by Django 5.1.3 on 2024-11-20 10:08
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0003_team_slug_nullable'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='team',
+            name='slug',
+        ),
+    ]