flow.js

    case CLEAR_ADDON_REVIEWS_FOR_REVIEWID: {
      const {
        payload: { reviewId },
      } = action;

      const newState = { ...state };
      const reviewData = state.byId[reviewId];

      if (reviewData) {
        const { addonId, addonSlug, userId } = reviewData;
        delete newState.byId[reviewId];
        return {
          ...newState,
          byAddon: {
            ...newState.byAddon,
            [addonSlug]: undefined,
          },
          byUserId: {
            ...newState.byUserId,
            [userId]: undefined,
          },
          groupedRatings: {
            ...newState.groupedRatings,
            [addonId]: undefined,
          },
        };
      }
      return newState;
    }