chore(custom-fields): remove dead 'Setting up VAT calculation hooks' print

The last line of create_custom_fields() was a print() with no code under it —
a leftover heading for setup that was never written. It only produced a
misleading line in the migrate log; VAT calculation is actually wired up by
patch_sales_documents(), an unrelated function.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

jey_erp/custom_fields.py

@@ -2120,4 +2120,3 @@ def create_custom_fields():
 
     # Коммит всех изменений
     frappe.db.commit()
-    print("Setting up VAT calculation hooks...")