Removing MSVC 2015 from ci.yml, and .appveyor.yml entirely.

.appveyor.yml

@@ -1,35 +0,0 @@
-version: 1.0.{build}
-image:
-- Visual Studio 2015
-test: off
-skip_branch_with_pr: true
-build:
-  parallel: true
-platform:
-- x86
-environment:
-  matrix:
-  - PYTHON: 36
-    CONFIG: Debug
-install:
-- ps: |
-    $env:CMAKE_GENERATOR = "Visual Studio 14 2015"
-    if ($env:PLATFORM -eq "x64") { $env:PYTHON = "$env:PYTHON-x64" }
-    $env:PATH = "C:\Python$env:PYTHON\;C:\Python$env:PYTHON\Scripts\;$env:PATH"
-    python -W ignore -m pip install --upgrade pip wheel
-    python -W ignore -m pip install pytest numpy --no-warn-script-location pytest-timeout
-- ps: |
-    Start-FileDownload 'https://gitlab.com/libeigen/eigen/-/archive/3.3.7/eigen-3.3.7.zip'
-    7z x eigen-3.3.7.zip -y > $null
-    $env:CMAKE_INCLUDE_PATH = "eigen-3.3.7;$env:CMAKE_INCLUDE_PATH"
-build_script:
-- cmake -G "%CMAKE_GENERATOR%" -A "%CMAKE_ARCH%"
-    -DCMAKE_CXX_STANDARD=14
-    -DPYBIND11_WERROR=ON
-    -DDOWNLOAD_CATCH=ON
-    -DCMAKE_SUPPRESS_REGENERATION=1
-    .
-- set MSBuildLogger="C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"
-- cmake --build . --config %CONFIG% --target pytest -- /m /v:m /logger:%MSBuildLogger%
-- cmake --build . --config %CONFIG% --target cpptest -- /m /v:m /logger:%MSBuildLogger%
-on_failure: if exist "tests\test_cmake_build" type tests\test_cmake_build\*.log*

.github/workflows/ci.yml

@@ -755,53 +755,6 @@ jobs:
     - name: Python tests
       run: cmake --build build -t pytest
 
-  win32-msvc2015:
-    name: "🐍 ${{ matrix.python }} • MSVC 2015 • x64"
-    runs-on: windows-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        python:
-          - 3.6
-          - 3.7
-          # todo: check/cpptest does not support 3.8+ yet
-
-    steps:
-    - uses: actions/checkout@v2
-
-    - name: Setup 🐍 ${{ matrix.python }}
-      uses: actions/setup-python@v2
-      with:
-        python-version: ${{ matrix.python }}
-
-    - name: Update CMake
-      uses: jwlawson/actions-setup-cmake@v1.12
-
-    - name: Prepare MSVC
-      uses: ilammy/msvc-dev-cmd@v1.10.0
-      with:
-        toolset: 14.0
-
-    - name: Prepare env
-      run: |
-        python -m pip install -r tests/requirements.txt
-
-    # First build - C++11 mode and inplace
-    - name: Configure
-      run: >
-        cmake -S . -B build
-        -G "Visual Studio 14 2015" -A x64
-        -DPYBIND11_WERROR=ON
-        -DDOWNLOAD_CATCH=ON
-        -DDOWNLOAD_EIGEN=ON
-
-    - name: Build C++14
-      run: cmake --build build -j 2
-
-    - name: Run all checks
-      run: cmake --build build -t check
-
-
   win32-msvc2017:
     name: "🐍 ${{ matrix.python }} • MSVC 2017 • x64"
     runs-on: windows-2016

README.rst

@@ -166,8 +166,6 @@ to the terms and conditions of this license.
    :target: https://gitter.im/pybind/Lobby
 .. |CI| image:: https://github.com/pybind/pybind11/workflows/CI/badge.svg
    :target: https://github.com/pybind/pybind11/actions
-.. |Build status| image:: https://ci.appveyor.com/api/projects/status/riaj54pn4h08xy40?svg=true
-   :target: https://ci.appveyor.com/project/wjakob/pybind11
 .. |PyPI package| image:: https://img.shields.io/pypi/v/pybind11.svg
    :target: https://pypi.org/project/pybind11/
 .. |Conda-forge| image:: https://img.shields.io/conda/vn/conda-forge/pybind11.svg