Remove direction field from Relation model

backend/labels/migrations/0011_remove_relation_direction.py

@@ -0,0 +1,17 @@
+# Generated by Django 4.0.2 on 2022-03-02 01:30
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("labels", "0010_rename_relationnew_relation"),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name="relation",
+            name="direction",
+        ),
+    ]

backend/labels/models.py

@@ -102,11 +102,6 @@ class Relation(Label):
     to_id = models.ForeignKey(Span, on_delete=models.CASCADE, related_name="to_relations")
     type = models.ForeignKey(RelationType, on_delete=models.CASCADE)
     example = models.ForeignKey(to=Example, on_delete=models.CASCADE, related_name="relations")
-    direction = models.CharField(
-        max_length=10,
-        choices=(("left", "left"), ("right", "right"), ("undirected", "undirected")),
-        default="undirected",
-    )
 
     def __str__(self):
         return self.__dict__.__str__()