Make linter happy

packages/qr-code-scanner/src/qr-code-scanner.js

 import {createInstance} from './i18n';
-import {css, html, unsafeCSS} from 'lit';
+import {css, html} from 'lit';
 import DBPLitElement from '@dbp-toolkit/common/dbp-lit-element';
 import * as commonStyles from '@dbp-toolkit/common/styles';
 import {ScopedElementsMixin} from '@open-wc/scoped-elements';
 import {Icon, MiniSpinner} from '@dbp-toolkit/common';
 import {classMap} from 'lit/directives/class-map.js';
 import * as commonUtils from '@dbp-toolkit/common/utils';
-import {getIconSVGURL} from '@dbp-toolkit/common';
 import {Mutex} from 'async-mutex';
 import {name as pkgName} from './../package.json';