fix: cannot edit valutaion_rate in asset repair

(cherry picked from commit 2aba6c38b36e5fce373800eb129a93eb010c691f)
diff --git a/erpnext/assets/doctype/asset_repair_consumed_item/asset_repair_consumed_item.json b/erpnext/assets/doctype/asset_repair_consumed_item/asset_repair_consumed_item.json
index 3c850c8..4685a09 100644
--- a/erpnext/assets/doctype/asset_repair_consumed_item/asset_repair_consumed_item.json
+++ b/erpnext/assets/doctype/asset_repair_consumed_item/asset_repair_consumed_item.json
@@ -16,8 +16,7 @@
    "fieldname": "valuation_rate",
    "fieldtype": "Currency",
    "in_list_view": 1,
-   "label": "Valuation Rate",
-   "read_only": 1
+   "label": "Valuation Rate"
   },
   {
    "fieldname": "consumed_quantity",