Remove unnecessary notistacks and dead terminal enable/disable code

- Remove 'Artikel angelegt.' snackbar from NewArticleTile
- Remove 'Kategorie angelegt.' snackbar from NewCategoryTile
- Remove dead handleEnableAllCategories method and binding from CompanySettingsDialog

src/components/article/NewArticleTile.jsx

@@ -1,6 +1,5 @@
 import { Component } from 'react';
 import { connect } from 'react-redux';
-import { enqueueSnackbar } from 'notistack';
 import { ActionTile } from '../tiles';
 import { createArticle as createArticleThunk } from '../../store/categorySlice';
 import ArticleNameDialog from './ArticleNameDialog';
@@ -25,7 +24,6 @@ class NewArticleTile extends Component {
   async handleSubmit({ name }) {
     const { parentId } = this.props;
     const article = await this.props.createArticle({ parentId, name }).unwrap();
-    enqueueSnackbar('Artikel angelegt.', { variant: 'success' });
     if (article) {
       this.props.onOpenArticle?.(article);
     }