Clean up some old pre-Amplitude tracking code (#841)

web/components/bets-list.tsx

@@ -1,7 +1,7 @@
 import Link from 'next/link'
 import { keyBy, groupBy, mapValues, sortBy, partition, sumBy } from 'lodash'
 import dayjs from 'dayjs'
-import { useEffect, useMemo, useState } from 'react'
+import { useMemo, useState } from 'react'
 import clsx from 'clsx'
 import { ChevronDownIcon, ChevronUpIcon } from '@heroicons/react/solid'
 
@@ -34,8 +34,6 @@ import {
   resolvedPayout,
   getContractBetNullMetrics,
 } from 'common/calculate'
-import { useTimeSinceFirstRender } from 'web/hooks/use-time-since-first-render'
-import { trackLatency } from 'web/lib/firebase/tracking'
 import { NumericContract } from 'common/contract'
 import { formatNumericProbability } from 'common/pseudo-numeric'
 import { useUser } from 'web/hooks/use-user'
@@ -84,13 +82,6 @@ export function BetsList(props: { user: User }) {
   const start = page * CONTRACTS_PER_PAGE
   const end = start + CONTRACTS_PER_PAGE
 
-  const getTime = useTimeSinceFirstRender()
-  useEffect(() => {
-    if (bets && contractsById && signedInUser) {
-      trackLatency(signedInUser.id, 'portfolio', getTime())
-    }
-  }, [signedInUser, bets, contractsById, getTime])
-
   if (!bets || !contractsById) {
     return <LoadingIndicator />
   }

web/hooks/use-time-since-first-render.ts

@@ -1,13 +0,0 @@
-import { useCallback, useEffect, useRef } from 'react'
-
-export function useTimeSinceFirstRender() {
-  const startTimeRef = useRef(0)
-  useEffect(() => {
-    startTimeRef.current = Date.now()
-  }, [])
-
-  return useCallback(() => {
-    if (!startTimeRef.current) return 0
-    return Date.now() - startTimeRef.current
-  }, [])
-}

web/lib/firebase/tracking.ts

@@ -1,43 +0,0 @@
-import { doc, collection, setDoc } from 'firebase/firestore'
-
-import { db } from './init'
-import { ClickEvent, LatencyEvent, View } from 'common/tracking'
-
-export async function trackView(userId: string, contractId: string) {
-  const ref = doc(collection(db, 'private-users', userId, 'views'))
-
-  const view: View = {
-    contractId,
-    timestamp: Date.now(),
-  }
-
-  return await setDoc(ref, view)
-}
-
-export async function trackClick(userId: string, contractId: string) {
-  const ref = doc(collection(db, 'private-users', userId, 'events'))
-
-  const clickEvent: ClickEvent = {
-    type: 'click',
-    contractId,
-    timestamp: Date.now(),
-  }
-
-  return await setDoc(ref, clickEvent)
-}
-
-export async function trackLatency(
-  userId: string,
-  type: 'feed' | 'portfolio',
-  latency: number
-) {
-  const ref = doc(collection(db, 'private-users', userId, 'latency'))
-
-  const latencyEvent: LatencyEvent = {
-    type,
-    latency,
-    timestamp: Date.now(),
-  }
-
-  return await setDoc(ref, latencyEvent)
-}