Revert "Bug 1281820 - Revert db schema changes temporarily (#1933)"

This reverts commit 5abb9e8608.

treeherder/model/migrations/0039_remove_legacy_artifact_pointers.py

@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('model', '0038_text_log_db'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='textlogsummary',
+            name='bug_suggestions_artifact_id',
+        ),
+        migrations.RemoveField(
+            model_name='textlogsummary',
+            name='text_log_summary_artifact_id',
+        ),
+    ]

treeherder/model/models.py

@@ -1392,8 +1392,6 @@ class TextLogSummary(models.Model):
     id = BigAutoField(primary_key=True)
     job_guid = models.CharField(max_length=50)
     repository = models.ForeignKey(Repository)
-    text_log_summary_artifact_id = models.PositiveIntegerField(blank=True, null=True)
-    bug_suggestions_artifact_id = models.PositiveIntegerField(blank=True, null=True)
 
     class Meta:
         db_table = 'text_log_summary'