delete workflows folder

.github/workflows/main.yml

@@ -1,16 +0,0 @@
-name: Codecov action workflow
-on: [push]
-jobs:
-  run:
-    name: Run
-    runs-on: ${{ matrix.operating-system }}
-    strategy:
-      matrix:
-        operating-system: [ubuntu-latest, windows-latest,macos-latest]
-    steps:
-    - uses: actions/checkout@master
-    
-    - name: Set Node.js 10.x
-      uses: actions/setup-node@master
-      with:
-        version: 10.x