Fix some linting issues

client/.eslintrc.js

@@ -95,6 +95,13 @@ module.exports = {
       },
     ],
     'no-unused-vars': 'off',
-    '@typescript-eslint/no-unused-vars': 'error',
+    '@typescript-eslint/no-unused-vars': [
+      'error',
+      {
+        argsIgnorePattern: '^_',
+        varsIgnorePattern: '^_',
+        caughtErrorsIgnorePattern: '^_',
+      },
+    ],
   },
 };

client/src/directives/click-outside.ts

@@ -1,5 +1,5 @@
 // taken from https://stackoverflow.com/questions/36170425/detect-click-outside-element
-import { DirectiveBinding, VNode } from 'vue';
+import { DirectiveBinding } from 'vue';
 
 declare global {
   interface HTMLElement {

client/src/helpers/matomo-client.ts

@@ -1,4 +1,3 @@
-import log from 'loglevel';
 import {
   CHAPTER_DESCRIPTION_TYPE,
   CHAPTER_TITLE_TYPE,

client/src/helpers/survey-solutions.ts

@@ -19,9 +19,7 @@ const extractAnswerFromQuestion = (previous: any[], question: Question) => {
   const type = question.getType();
   if (type === 'matrix' || type === 'matrixdropdown') {
     const correctAnswer = question.correctAnswer;
-    const { rows, columns } = question;
-    const col1 = columns[0];
-    const col2 = columns[1];
+    const { rows } = question;
 
     answer = rows.map(({ text, value }: RowKey) => {
       const labelWitoutPunctuation = /[,.!?]/.test(text.slice(-1)) ? text.slice(0, -1) : text; // the last character might be a period, comma, question or exclamation mark. If not, we just return the key as-is

client/src/mixins/me.ts

@@ -1,7 +1,7 @@
 import ME_QUERY from '@/graphql/gql/queries/meQuery.gql';
 import { computed } from 'vue';
 import { useQuery } from '@vue/apollo-composable';
-import { matomoTrackPageView, matomoTrackUser } from '@/helpers/matomo-client';
+import { matomoTrackUser } from '@/helpers/matomo-client';
 
 export interface Me {
   selectedClass: {

client/src/setup/setupApp.ts

@@ -1,4 +1,4 @@
-import { createApp, h, provide } from 'vue';
+import { createApp } from 'vue';
 import App from '@/App.vue';
 
 import apolloClients from './apollo';