YAML modification

Temporarily removed clang-9 section

.github/workflows/main.yml

@@ -30,25 +30,4 @@ jobs:
         name: Testfile
         path: test/etl_tests
 
-  build-clang-9-Linux:
-    runs-on: ubuntu-18.04
-    steps:
-    - uses: actions/checkout@v2
 
-    - name: Setup cmake
-      run: |
-          export CC=clang-9
-          export CXX=clang++-9
-          cmake -D BUILD_TESTS=ON ./
-
-    - name: Compile
-      run: make
-    
-    - name: Run tests
-      run: ./test/etl_tests
-    
-    - name: Save artifacts
-      uses: actions/upload-artifact@v2
-      with:
-        name: Testfile
-        path: test/etl_tests