Remove unused function

Author: dcorbacho

deps/rabbit/src/rabbit_table.erl

@@ -325,16 +325,6 @@ definitions() ->
         ++ mirrored_supervisor:table_definitions()
         ++ rabbit_maintenance:table_definitions().
 
--spec rabbit_index_route_definition() -> list(tuple()).
-rabbit_index_route_definition() ->
-    [{record_name, index_route},
-     {attributes, record_info(fields, index_route)},
-     {type, bag},
-     {storage_properties, [{ets, [{read_concurrency, true}]}]},
-     {match, #index_route{source_key = {exchange_name_match(), '_'},
-                          destination = binding_destination_match(),
-                          _='_'}}].
-
 pre_khepri_definitions() ->
     [{rabbit_user,
       [{record_name, internal_user},