fix: Use existing bank fields to match by bank account no/IBAN

- Remove newly added fields in Party doctypes to store bank details
- Use Bank Account's fields to match against account no/iban
- For employee, if Bank Account does not exist, find in Employee doctype against account no/iban
diff --git a/erpnext/accounts/doctype/bank_transaction/auto_match_party.py b/erpnext/accounts/doctype/bank_transaction/auto_match_party.py
index 2a2aff1..e43d9be 100644
--- a/erpnext/accounts/doctype/bank_transaction/auto_match_party.py
+++ b/erpnext/accounts/doctype/bank_transaction/auto_match_party.py
@@ -99,15 +99,24 @@
 		for party in parties:
 			or_filters = {}
 			if self.bank_party_account_number:
-				acc_no_field = "bank_ac_no" if party == "Employee" else "bank_account_no"
-				or_filters[acc_no_field] = self.bank_party_account_number
+				or_filters["bank_account_no"] = self.bank_party_account_number
 
 			if self.bank_party_iban:
 				or_filters["iban"] = self.bank_party_iban
 
 			party_result = frappe.db.get_all(
-				party, or_filters=or_filters, pluck="name", limit_page_length=1
+				"Bank Account", or_filters=or_filters, pluck="name", limit_page_length=1
 			)
+
+			if party == "Employee" and not party_result:
+				# Search in Bank Accounts first for Employee, and then Employee record
+				if "bank_account_no" in or_filters:
+					or_filters["bank_ac_no"] = or_filters.pop("bank_account_no")
+
+				party_result = frappe.db.get_all(
+					party, or_filters=or_filters, pluck="name", limit_page_length=1
+				)
+
 			if party_result:
 				result = (
 					party,
diff --git a/erpnext/buying/doctype/supplier/supplier.json b/erpnext/buying/doctype/supplier/supplier.json
index a80dcfe..f009789 100644
--- a/erpnext/buying/doctype/supplier/supplier.json
+++ b/erpnext/buying/doctype/supplier/supplier.json
@@ -52,11 +52,6 @@
   "supplier_primary_address",
   "primary_address",
   "accounting_tab",
-  "bank_details_section",
-  "bank_account_no",
-  "column_break_n8mz",
-  "iban",
-  "section_break_ow3k",
   "payment_terms",
   "accounts",
   "settings_tab",
@@ -450,29 +445,6 @@
   {
    "fieldname": "column_break_59",
    "fieldtype": "Column Break"
-  },
-  {
-   "fieldname": "bank_details_section",
-   "fieldtype": "Section Break",
-   "label": "Bank Details"
-  },
-  {
-   "fieldname": "bank_account_no",
-   "fieldtype": "Data",
-   "label": "Bank Account No"
-  },
-  {
-   "fieldname": "column_break_n8mz",
-   "fieldtype": "Column Break"
-  },
-  {
-   "fieldname": "iban",
-   "fieldtype": "Data",
-   "label": "IBAN"
-  },
-  {
-   "fieldname": "section_break_ow3k",
-   "fieldtype": "Section Break"
   }
  ],
  "icon": "fa fa-user",
@@ -485,7 +457,7 @@
    "link_fieldname": "party"
   }
  ],
- "modified": "2023-03-30 15:50:40.241257",
+ "modified": "2023-05-09 15:34:13.408932",
  "modified_by": "Administrator",
  "module": "Buying",
  "name": "Supplier",
diff --git a/erpnext/selling/doctype/customer/customer.json b/erpnext/selling/doctype/customer/customer.json
index 5dc6a72..72a1594 100644
--- a/erpnext/selling/doctype/customer/customer.json
+++ b/erpnext/selling/doctype/customer/customer.json
@@ -61,10 +61,6 @@
   "tax_category",
   "tax_withholding_category",
   "accounting_tab",
-  "bank_details_section",
-  "bank_account_no",
-  "column_break_xtwg",
-  "iban",
   "credit_limit_section",
   "payment_terms",
   "credit_limits",
@@ -559,25 +555,6 @@
   {
    "fieldname": "column_break_54",
    "fieldtype": "Column Break"
-  },
-  {
-   "fieldname": "bank_details_section",
-   "fieldtype": "Section Break",
-   "label": "Bank Details"
-  },
-  {
-   "fieldname": "bank_account_no",
-   "fieldtype": "Data",
-   "label": "Bank Account No"
-  },
-  {
-   "fieldname": "column_break_xtwg",
-   "fieldtype": "Column Break"
-  },
-  {
-   "fieldname": "iban",
-   "fieldtype": "Data",
-   "label": "IBAN"
   }
  ],
  "icon": "fa fa-user",
@@ -591,7 +568,7 @@
    "link_fieldname": "party"
   }
  ],
- "modified": "2023-03-30 15:45:44.387975",
+ "modified": "2023-05-09 15:38:40.255193",
  "modified_by": "Administrator",
  "module": "Selling",
  "name": "Customer",