[hub] fix code lint issues, styles

erpnext/hub_node/data_migration_mapping/item_to_hub_item/__init__.py

@@ -1,32 +0,0 @@
-import frappe, io, base64, urllib, os, json
-from frappe.utils.file_manager import get_file_path
-
-def pre_process(doc):
-
-	file_path = doc.image
-	file_name = os.path.basename(file_path)
-
-	if file_path.startswith('http'):
-		url = file_path
-		file_path = os.path.join('/tmp', file_name)
-		urllib.urlretrieve(url, file_path)
-	else:
-		file_path = os.path.abspath(get_file_path(file_path))
-
-	try:
-		with io.open(file_path, 'rb') as f:
-			doc.image = json.dumps({
-				'file_name': file_name,
-				'base64': base64.b64encode(f.read())
-			})
-	except Exception as e:
-		frappe.log_error(title='Hub Sync Error')
-
-	cached_details = frappe.get_doc('Hub Tracked Item', doc.item_code)
-
-	if cached_details:
-		doc.hub_category = cached_details.hub_category
-		doc.image_list = cached_details.image_list
-
-	return doc
-