Remove `get_document_index_by_id` function

@@ -440,17 +440,6 @@ def get_complaint_index_by_complaintID(data, complaintID):
     return index
 
 
-def get_document_index_by_id(data, document_id):
-    if not data:
-        return 0
-    for index, element in enumerate(data):
-        if element['title'] == document_id:
-            break
-    else:
-         index += 1
-    return index
-
-
 def generate_test_bid_data(tender_data):
     bid = test_bid_data()
     if 'aboveThreshold' in tender_data.get('procurementMethodType', '') or 'competitiveDialogue' in tender_data.get('procurementMethodType', ''):