Delete unused CI

.github/workflows/main2.yml

@@ -1,40 +0,0 @@
-# This is a basic workflow to help you get started with Actions
-
-name: CI
-
-# Controls when the action will run. Triggers the workflow on push or pull request
-# events but only for the master branch
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-
-# A workflow run is made up of one or more jobs that can run sequentially or in parallel
-jobs:
-  # This workflow contains a single job called "build"
-  build:
-    # The type of runner that the job will run on
-    runs-on: ubuntu-latest
-
-    # Steps represent a sequence of tasks that will be executed as part of the job
-    steps:
-    # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-    - uses: actions/checkout@v2
-
-    - name: Build & Test
-        uses: ashutoshvarma/action-cmake-build@master
-        with:
-          build-dir: ${{ runner.workspace }}/build
-          # will set the CC & CXX for cmake
-          cc: gcc
-          cxx: g++
-          build-type: Release
-          # Extra options pass to cmake while configuring project
-          configure-options: -DCMAKE_C_FLAGS=-w32 -DPNG_INCLUDE=OFF
-          run-test: true
-          ctest-options: -R mytest
-          # install the build using cmake --install
-          install-build: true
-          # run build using '-j [parallel]' to use multiple threads to build
-          parallel: 14