chore(bank-integration): remove completed standard_field code migration

migrate_standard_field_codes_to_labels() rewrote Bank Integration Excel Column
Mapping.standard_field from old machine codes to human-readable labels — a
one-time compatibility fix after the storage format changed. The migration has
done its job: the preset fixture already ships labels, and new sites create
mappings via the UI dropdown (labels from the start), so old codes can only
exist on databases that predate the format change. Drop the function, its
code->label map, and the after_migrate call.

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

jey_erp/bank_integration/migrations.py

@@ -152,22 +152,6 @@ def rename_bip_purposes():
 	_rename_to_readable("Bank Integration Supplier", "BIS", "supplier_name")
 
 
-_STANDARD_FIELD_CODE_TO_LABEL = {
-	"date": "Date",
-	"reference_number": "Reference Number",
-	"counterparty": "Counterparty",
-	"counterparty_tax_id": "Counterparty Tax ID (VOEN)",
-	"counterparty_iban": "Counterparty IBAN",
-	"amount": "Amount",
-	"debit": "Debit",
-	"credit": "Credit",
-	"direction": "Direction",
-	"currency": "Currency",
-	"purpose": "Purpose",
-	"description": "Description",
-}
-
-
 _PRESET_FIELDS_TO_COPY = (
 	"header_row",
 	"amount_mode",
@@ -243,29 +227,3 @@ def copy_excel_preset_into_bank_integration():
 	if copied:
 		frappe.db.commit()
 		print(f"BI: copied File Format from preset '{chosen_preset_name}' into {copied} Bank Integration(s)")
-
-
-def migrate_standard_field_codes_to_labels():
-	"""Rewrite Bank Integration Excel Column Mapping.standard_field from the old
-	machine codes ('date', 'reference_number', ...) to the new human-readable
-	labels stored by the doctype select options. Idempotent: rows already on a
-	label value are left alone."""
-	if not frappe.db.exists("DocType", "Bank Integration Excel Column Mapping"):
-		return
-	rows = frappe.get_all(
-		"Bank Integration Excel Column Mapping",
-		filters={"standard_field": ["in", list(_STANDARD_FIELD_CODE_TO_LABEL.keys())]},
-		fields=["name", "standard_field"],
-	)
-	if not rows:
-		return
-	for r in rows:
-		label = _STANDARD_FIELD_CODE_TO_LABEL.get(r.standard_field)
-		if not label:
-			continue
-		frappe.db.set_value(
-			"Bank Integration Excel Column Mapping", r.name,
-			"standard_field", label, update_modified=False,
-		)
-	frappe.db.commit()
-	print(f"BI: migrated {len(rows)} Excel column mapping(s) to human-readable labels")

jey_erp/hooks.py

@@ -142,13 +142,11 @@ def after_migrate_combined():
         from jey_erp.bank_integration.migrations import (
             link_kb_bank_accounts_to_bi,
             rename_bip_purposes,
-            migrate_standard_field_codes_to_labels,
             copy_excel_preset_into_bank_integration,
             add_importer_link_to_invoicing_workspace,
         )
         link_kb_bank_accounts_to_bi()
         rename_bip_purposes()
-        migrate_standard_field_codes_to_labels()
         copy_excel_preset_into_bank_integration()
         add_importer_link_to_invoicing_workspace()
     except Exception as e: