Drop browser tests from test suite

As much as I'd like to keep them, they're just too flaky right now.

.github/workflows/tests.yml

@@ -61,53 +61,3 @@ jobs:
         run: |
           ./vendor/bin/parallel-lint --exclude vendor --exclude storage --exclude tests/fixtures/plugins/testvendor/goto/Plugin.php .
           ./vendor/bin/phpunit --prepend ./vendor/october/rain/src/Support/helpers.php
-  duskTests:
-    runs-on: ubuntu-latest
-    name: Browser Tests
-    steps:
-      - name: Checkout changes
-        uses: actions/checkout@v1
-      - name: Install PHP
-        uses: shivammathur/setup-php@v1
-        with:
-          php-version: '7.3'
-          extensions: mbstring, intl, gd, xml, sqlite
-      - name: Setup problem matcher for PHPUnit
-        run: echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
-      - name: Set Composer cache
-        id: composer-cache
-        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
-      - name: Cache Composer dependencies
-        uses: actions/cache@v1
-        with:
-          path: ${{ steps.composer-cache.outputs.dir }}
-          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
-          restore-keys: ${{ runner.os }}-composer-
-      - name: Install Dusk plugin
-        run: |
-            curl -fLs https://github.com/rainlab/dusk-plugin/archive/master.zip -o rainlab-dusk.zip
-            mkdir -p plugins/rainlab
-            unzip rainlab-dusk.zip -d plugins/rainlab
-            mv plugins/rainlab/dusk-plugin-master plugins/rainlab/dusk
-      - name: Install Composer dependencies
-        run: composer install --no-interaction --no-progress --no-suggest
-      - name: Run post-update Composer scripts
-        run: php artisan package:discover
-      - name: Reset October modules
-        run: |
-          git reset --hard HEAD
-          composer dumpautoload
-      - name: Install Chrome driver
-        run: php artisan dusk:chrome-driver
-      - name: Start Chrome driver
-        run: ./vendor/laravel/dusk/bin/chromedriver-linux > /dev/null 2>&1 &
-      - name: Run Laravel Server
-        run: php artisan serve > /dev/null 2>&1 &
-      - name: Run Dusk Tests
-        run: php artisan dusk
-      - name: Upload Dusk Screenshots
-        uses: actions/upload-artifact@v1
-        if: failure()
-        with:
-          name: dusk-screenshots
-          path: ./storage/dusk/screenshots