Revert "Add routingMode query parameter to /journeys route"

This reverts commit bfdd427.

api.js

@@ -20,8 +20,6 @@ import {parseBoolean, parseInteger} from 'hafas-rest-api/lib/parse.js'
 import {loyaltyCardParser} from './lib/loyalty-cards.js'
 import {route as stations} from './routes/stations.js'
 import {route as station} from './routes/station.js'
-import {parseRoutingMode} from './lib/parse.js'
-import {routingModes} from 'hafas-client/p/db/routing-modes.js'
 
 const pkg = require('./package.json')
 
@@ -105,13 +103,6 @@ const mapRouteParsers = (route, parsers) => {
 			defaultStr: '*adult*',
 			parse: parseInteger
 		},
-		routingMode: {
-			description: 'HAFAS routing mode, see [Routing Mode](#routing-mode)',
-			type: 'string',
-			enum: Object.keys(routingModes),
-			defaultStr: '\`REALTIME\`',
-			parse: parseRoutingMode
-		},
 	}
 }