fix typo

- remove unwanted code
	- fix dropdown bug
	- add bar graph for test count

src/components/TestAnalytics.js

@@ -1,12 +1,9 @@
 import React, { useEffect, useState } from 'react';
 import { query, collection, onSnapshot, getDocs } from 'firebase/firestore';
 import * as _ from 'lodash';
-import Dropdown from 'react-dropdown';
 import 'react-dropdown/style.css';
 import moment from 'moment';
-import Select from 'react-select';
 
-import DeviceGraph from "./DeviceGraph";
 import db from '../firebase';
 import './TestAnalytics.css';
 import TestAnalyticsGraph from './TestAnalyticsGraph';
@@ -47,49 +44,6 @@ const TestAnalytics = () => {
     const [curDayTests, setCurDayTests] = useState(null);
     const [dailyCategoryCounts, setDailyCategoryCounts] = useState(null);
 
-    const changeDevice = ({ value }) => {
-        setDevice(value);
-        setDays([...new Set(allTests
-            .filter((x) => {
-                if (x.deviceSerialNumber === value) return x;
-            })
-            .map(x => moment(x.testTime).format("YYYY-MM-DD")))]
-            .sort()
-            .reverse());
-    }
-
-    const changeTestDate = ({ value }) => {
-        setTestDate(value);
-        setCurTest(null);
-        setCurTestData(null);
-        setShowGraph(false);
-        setTests(allTests
-            .filter((x) => {
-                if (x.deviceSerialNumber === device && moment(x.testTime).isBetween(moment(value).startOf('day'), moment(value).endOf('day'))) return x;
-            })
-            .map(x => x._id)
-            .sort());
-    }
-
-    const changeTest = ({ value }) => {
-        setCurTestData(null); setShowGraph(false);
-        setCurTest(value);
-    }
-
-    const showTestGraph = () => {
-        if (!curTest) alert('Select a test');
-        setCurTestData(allTests.find(x => x._id === curTest));
-        setShowGraph(true);
-    }
-
-    const toggleShowGraph = () => {
-        if (!curTestData) {
-            showTestGraph();
-        } else {
-            setCurTest(null); setCurTestData(null);
-        }
-    }
-
     useEffect(() => {
         if (!allTests) {
             const q = query(collection(db, "testData"));