Delete .github directory

.github/workflows

@@ -1,25 +0,0 @@
-name: Build
-
-on: [push, pull_request]
-
-jobs:
-  build:
-    strategy:
-      matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
-    runs-on: ${{ matrix.os }}
-    
-    steps:
-    - uses: actions/checkout@v2
-    
-    - name: Configure CMake
-      run: cmake -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=Release
-
-    - name: Build
-      run: cmake --build ${{github.workspace}}/build --config Release
-
-    - name: Upload artifact
-      uses: actions/upload-artifact@v2
-      with:
-        name: gravity-simulator-${{ matrix.os }}
-        path: ${{github.workspace}}/build/GravitySimulator  # Adjust this path