Remove GitHub workflows

.github/workflows/build.yml

@@ -1,18 +0,0 @@
-name: Build
-on: [ push, pull_request ]
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    if: "!contains(github.event.commits[0].message, '[ci-skip]')"
-    steps:
-      - uses: actions/checkout@v2
-      - uses: gradle/wrapper-validation-action@v1
-      - uses: actions/setup-java@v2
-        with:
-          distribution: temurin
-          java-version: 17
-      - name: Configure Git
-        run: git config --global user.email "no-reply@github.com" && git config --global user.name "Github Actions"
-      - name: Build
-        run: ./gradlew build --stacktrace