Move RIDE_RATING_STATION_FLAG_NO_ENTRANCE to source file

src/openrct2/ride/RideRatings.cpp

@@ -45,6 +45,11 @@ enum
     RIDE_RATINGS_STATE_5
 };
 
+enum
+{
+    RIDE_RATING_STATION_FLAG_NO_ENTRANCE = 1 << 0
+};
+
 enum
 {
     PROXIMITY_WATER_OVER,                   // 0x0138B596

src/openrct2/ride/RideRatings.h

@@ -46,11 +46,6 @@ static_assert(sizeof(RatingTuple) == 6);
 
 #pragma pack(pop)
 
-enum
-{
-    RIDE_RATING_STATION_FLAG_NO_ENTRANCE = 1 << 0
-};
-
 struct RideRatingUpdateState
 {
     CoordsXYZ Proximity;