ci: reset all ci setup

appveyor.yml

@@ -1,25 +0,0 @@
-version: "{build}"
-os: Visual Studio 2015
-
-environment:
-  matrix:
-    - generator: Visual Studio 14 2015 Win64
-    - generator: Visual Studio 14 2015
-
-configuration:
-  - Release
-  - Debug
-
-clone_depth: 10
-clone_folder: c:\toml11
-
-build_script:
-  - cd C:\toml11
-  - mkdir build
-  - cd build
-  - cmake -G"%generator%" -DCMAKE_CXX_STANDARD=11 -DBOOST_ROOT=C:/Libraries/boost_1_69_0 -Dtoml11_BUILD_TEST=ON ..
-  - cmake --build . --config "%configuration%"
-  - file --mime-encoding tests/toml/tests/hard_example_unicode.toml
-
-test_script:
-  - ctest --build-config "%configuration%" --timeout 300 --output-on-failure