VS2017 is not supported

azure-pipelines.yml

 # Refer: https://aka.ms/yaml
 
 jobs:
-  - job: Windows_MSVC_VS2017
-    pool:
-      vmImage: vs2017-win2016
-    steps:
-      - script: |
-          echo Loading VS environment
-          call "C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\Enterprise\\Common7\\Tools\\vsdevcmd" -arch=x64 || exit 1
-          echo Executing build/test script
-          python -u tools/build.py --cxx cl.exe --test --static || exit 1
-        displayName: Build and Run Unit Tests
-      - publish: _build/ddslim.exe
-        artifact: DDSLiM Executable - Windows VS2017
-      - script: |
-          echo Loading VS environment
-          call "C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\Enterprise\\Common7\\Tools\\vsdevcmd" -arch=x64 || exit 1
-          python -u tools/test.py --exe _build/ddslim.exe -T:msvc || exit 1
-        displayName: Smoke Tests
-
   - job: Windows_MSVC_VS2019
     pool:
       vmImage: windows-2019