Remove 'minimum' order from SupplierPart

- This can be handled using the 'PriceBreak' set

InvenTree/company/migrations/0003_remove_supplierpart_minimum.py

@@ -0,0 +1,17 @@
+# Generated by Django 2.2 on 2019-05-21 03:51
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('company', '0002_auto_20190520_2204'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='supplierpart',
+            name='minimum',
+        ),
+    ]