comment out leaderboard; remove dummy data

Since we have implemented the real metrics for the "surveys" section of the dashboard, we do not need the dummy metrics anymore.
Commented out the "engagement" section (leaderboard); it will be done in the next step.

www/js/metrics/MetricsTab.tsx

@@ -46,103 +46,6 @@ export const DEFAULT_METRICS_LIST: MetricsList = {
   response_count: ['mode_confirm'],
 };
 
-export type SurveyObject = {
-  answered: number;
-  unanswered: number;
-  mismatched: number;
-};
-
-export type SurveyMetric = {
-  me: {
-    overview: SurveyObject;
-    rank: number;
-    details: {
-      [key: string]: SurveyObject;
-    };
-  };
-  others: {
-    overview: SurveyObject;
-    leaderboard: SurveyObject[];
-  };
-};
-
-const DUMMY_SURVEY_METRIC: SurveyMetric = {
-  me: {
-    overview: {
-      answered: 5,
-      unanswered: 5,
-      mismatched: 0,
-    },
-    rank: 5,
-    details: {
-      ev_roaming_trip: {
-        answered: 10,
-        unanswered: 5,
-        mismatched: 0,
-      },
-      ev_return_trip: {
-        answered: 10,
-        unanswered: 10,
-        mismatched: 0,
-      },
-      gas_car_trip: {
-        answered: 5,
-        unanswered: 10,
-        mismatched: 0,
-      },
-    },
-  },
-  others: {
-    overview: {
-      answered: 30,
-      unanswered: 60,
-      mismatched: 0,
-    },
-    leaderboard: [
-      {
-        answered: 10,
-        unanswered: 0,
-        mismatched: 0,
-      },
-      {
-        answered: 9,
-        unanswered: 1,
-        mismatched: 0,
-      },
-      {
-        answered: 8,
-        unanswered: 2,
-        mismatched: 0,
-      },
-      {
-        answered: 7,
-        unanswered: 3,
-        mismatched: 0,
-      },
-      {
-        answered: 6,
-        unanswered: 4,
-        mismatched: 0,
-      },
-      {
-        answered: 4,
-        unanswered: 6,
-        mismatched: 0,
-      },
-      {
-        answered: 2,
-        unanswered: 8,
-        mismatched: 0,
-      },
-      {
-        answered: 1,
-        unanswered: 9,
-        mismatched: 0,
-      },
-    ],
-  },
-};
-
 async function fetchMetricsFromServer(
   type: 'user' | 'aggregate',
   dateRange: [string, string],
@@ -331,14 +234,15 @@ const MetricsTab = () => {
             <SurveyTripCategoriesCard userMetrics={userMetrics} aggMetrics={aggMetrics} />
           </Carousel>
         )}
-        {sectionsToShow.includes('engagement') && (
+        {/* we will implement leaderboard later */}
+        {/* {sectionsToShow.includes('engagement') && (
           <Carousel cardWidth={cardWidth} cardMargin={cardMargin}>
             <SurveyLeaderboardCard
               surveyMetric={DUMMY_SURVEY_METRIC}
               studyStartDate={studyStartDate}
             />
           </Carousel>
-        )}
+        )} */}
       </ScrollView>
     </>
   );