Improve GH action build time

Tests are redundant because right now it's just making sure the image can build. But if the image _can't_ build, it'll fail the second time around as well, making the first "test" redundant.

.github/workflows/dockerpublish.yml

@@ -18,29 +18,9 @@ env:
   IMAGE_NAME: shynet
 
 jobs:
-  # Run tests.
-  # See also https://docs.docker.com/docker-hub/builds/automated-testing/
-  test:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v2
-
-      - name: Run tests
-        run: |
-          if [ -f docker-compose.test.yml ]; then
-            docker-compose --file docker-compose.test.yml build
-            docker-compose --file docker-compose.test.yml run sut
-          else
-            docker build . --file Dockerfile
-          fi
-
   # Push image to GitHub Packages.
   # See also https://docs.docker.com/docker-hub/builds/
   push:
-    # Ensure test job passes before pushing image.
-    needs: test
-
     runs-on: ubuntu-latest
     if: github.event_name == 'push'