Remove unneeded tile access token

Author: DennisOSRM

docker/Dockerfile

@@ -6,7 +6,6 @@ ENV OSRM_CENTER='38.8995,-77.0269'
 ENV OSRM_ZOOM='13'
 ENV OSRM_LANGUAGE='en'
 ENV OSRM_LABEL='Car (fastest)'
-ENV OSRM_MAPBOX_TOKEN='pk.eyJ1IjoibXNsZWUiLCJhIjoiclpiTWV5SSJ9.P_h8r37vD8jpIH1A6i1VRg'
 
 # Copy package.json
 RUN mkdir -p /src