remove movable bridge travel mode references

src/engine/api/json_factory.cpp

@@ -100,9 +100,6 @@ std::string modeToString(const extractor::TravelMode mode)
     case TRAVEL_MODE_PUSHING_BIKE:
         token = "pushing bike";
         break;
-    case TRAVEL_MODE_MOVABLE_BRIDGE:
-        token = "movable bridge";
-        break;
     case TRAVEL_MODE_STEPS_UP:
         token = "steps up";
         break;

src/extractor/scripting_environment.cpp

@@ -80,7 +80,6 @@ void ScriptingEnvironment::InitContext(ScriptingEnvironment::Context &context)
                              luabind::value("ferry", TRAVEL_MODE_FERRY),
                              luabind::value("train", TRAVEL_MODE_TRAIN),
                              luabind::value("pushing_bike", TRAVEL_MODE_PUSHING_BIKE),
-                             luabind::value("movable_bridge", TRAVEL_MODE_MOVABLE_BRIDGE),
                              luabind::value("steps_up", TRAVEL_MODE_STEPS_UP),
                              luabind::value("steps_down", TRAVEL_MODE_STEPS_DOWN),
                              luabind::value("river_up", TRAVEL_MODE_RIVER_UP),