refactor!: drop deprecated Material theme from all components (#9195)

Author: web-padawan

.github/workflows/visual-tests.yml

@@ -79,40 +79,3 @@ jobs:
           path: |
             packages/*/test/visual/lumo/screenshots/*/failed/*.png
             packages/vaadin-lumo-styles/test/visual/screenshots/failed/*.png
-  material:
-    name: Material
-    runs-on: ubuntu-latest
-    if: github.repository_owner == 'vaadin'
-
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          fetch-depth: '0'
-
-      - name: Setup Node
-        uses: actions/setup-node@v4
-        with:
-          node-version: '22'
-          cache: 'yarn'
-
-      - name: Install Dependencies
-        run: yarn --frozen-lockfile --no-progress --non-interactive
-
-      - name: Visual tests
-        uses: nick-fields/retry@v3
-        env:
-          SAUCE_USERNAME: ${{ secrets.SAUCE_USERNAME }}
-          SAUCE_ACCESS_KEY: ${{ secrets.SAUCE_ACCESS_KEY }}
-        with:
-          timeout_minutes: 20
-          retry_wait_seconds: 60
-          max_attempts: 3
-          command: yarn test:material
-
-      - uses: actions/upload-artifact@v4
-        if: ${{ failure() }}
-        with:
-          name: screenshots
-          path: |
-            packages/*/test/visual/material/screenshots/*/failed/*.png
-            packages/vaadin-material-styles/test/visual/screenshots/failed/*.png

DEVELOPMENT.md

@@ -138,24 +138,12 @@ Run tests for Lumo:
 yarn test:lumo
 ```
 
-Run tests for Material:
-
-```sh
-yarn test:material
-```
-
 Update reference screenshots for Lumo:
 
 ```sh
 yarn update:lumo
 ```
 
-Update reference screenshots for Material:
-
-```sh
-yarn update:material
-```
-
 Update screenshots for single package:
 
 ```sh