Remove builder v1 support

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

.github/workflows/ci.yml

@@ -12,30 +12,6 @@ on:
 
 jobs:
   main:
-    runs-on: ubuntu-latest
-    steps:
-      -
-        name: Run local registry
-        run: |
-          docker run -d -p 5000:5000 registry:2
-      -
-        name: Checkout
-        uses: actions/checkout@v2.3.1
-      -
-        name: Build and push
-        uses: ./
-        with:
-          context: ./test
-          file: ./test/Dockerfile
-          push: true
-          tags: |
-            localhost:5000/name/app:latest
-            localhost:5000/name/app:1.0.0
-      -
-        name: Dump context
-        uses: crazy-max/ghaction-dump-context@v1
-
-  buildx:
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false