Revert `e-road` and `a-road`.

layers/transportation/update_route_member.sql

@@ -48,10 +48,6 @@ WHERE length(ref) > 1
 CREATE OR REPLACE FUNCTION osm_route_member_network_type(network text, ref text) RETURNS route_network_type AS
 $$
 SELECT CASE
-           -- https://wiki.openstreetmap.org/wiki/WikiProject_Europe/E-road_network
-           WHEN network = 'e-road' THEN 'e-road'::route_network_type
-           -- https://wiki.openstreetmap.org/wiki/Asia/Asian_Highway_Network
-           WHEN network = 'AsianHighway' THEN 'a-road'::route_network_type
            -- https://wiki.openstreetmap.org/wiki/United_States_roads_tagging
            WHEN network = 'US:I' THEN 'us-interstate'::route_network_type
            WHEN network = 'US:US' THEN 'us-highway'::route_network_type