build system: the conan-center-index makes the custom deploy step useless (close #380)

.github/workflows/deploy.yml

@@ -1,33 +0,0 @@
-name: deploy
-
-on:
-  push:
-    tags:
-      - v*
-
-jobs:
-
-  conan:
-    timeout-minutes: 10
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: docker://conanio/gcc8
-    - uses: actions/checkout@v1
-    - name: Setup Python
-      uses: actions/setup-python@master
-      with:
-        version: 3.6
-    - name: Install
-      run: |
-        chmod +x conan/ci/install.sh
-        ./conan/ci/install.sh
-    - name: Deploy
-      env:
-        CONAN_LOGIN_USERNAME: ${{ secrets.CONAN_LOGIN_USERNAME }}
-        CONAN_PASSWORD: ${{ secrets.CONAN_PASSWORD }}
-        CONAN_UPLOAD: ${{ secrets.CONAN_UPLOAD }}
-        CONAN_GCC_VERSIONS: 8
-      run: |
-        chmod +x conan/ci/build.sh
-        ./conan/ci/build.sh