Revert all GH actions work

.github/workflows/build.yml

@@ -1,35 +0,0 @@
-name: "Build"
-on:
-  push:
-    tags-ignore:
-      - '*'
-    paths-ignore:
-      - '.txt'
-      - '*.MD'
-      - '*.md'
-      - 'LICENSE'
-      - 'docs/**'
-
-jobs:
-  build:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
-        java: [16]
-    steps:
-      - uses: actions/checkout@v2
-      - name: Set up JDK ${{ matrix.java }}
-        uses: actions/setup-java@v2
-        with:
-          distribution: 'zulu'
-          java-version: ${{ matrix.java }}
-          architecture: x64
-      - name: Cache Maven packages
-        uses: actions/cache@v2.1.5
-        with:
-          path: ~/.m2
-          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
-          restore-keys: ${{ runner.os }}-m2
-      - name: Build with Maven
-        run: mvn package