Remove old 'manufacturer_name' field

InvenTree/company/migrations/0021_remove_supplierpart_manufacturer_name.py

@@ -0,0 +1,17 @@
+# Generated by Django 2.2.10 on 2020-04-13 10:24
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('company', '0020_auto_20200413_0839'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='supplierpart',
+            name='manufacturer_name',
+        ),
+    ]