removed not needed CI configurations

.github/FUNDING.yml

-# These are supported funding model platforms
-
-github: lefticus
-patreon: lefticus

.github/workflows/build_cmake.yml

-name: CMake
-
-on: [push]
-
-env:
-  # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
-  BUILD_TYPE: RelWithDebInfo
-
-jobs:
-  build:
-
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest]
-
-    steps:
-    - uses: actions/checkout@v2
-
-    - name: Create Build Environment
-      # Some projects don't allow in-source building, so create a separate build directory
-      # We'll use this as our working directory for all subsequent commands
-      run: cmake -E make_directory ${{runner.workspace}}/build
-
-    - name: Install conan
-      shell: bash
-      run: |
-        python3 -m pip install --upgrade pip setuptools
-        python3 -m pip install conan
-        source ~/.profile
-
-    - name: Configure CMake
-      # Use a bash shell so we can use the same syntax for environment variable
-      # access regardless of the host operating system
-      shell: bash
-      working-directory: ${{runner.workspace}}/build
-      # Note the current convention is to use the -S and -B options here to specify source 
-      # and build directories, but this is only available with CMake 3.13 and higher.  
-      # The CMake binaries on the Github Actions machines are (as of this writing) 3.12
-      # 
-      # We need to source the profile file to make sure conan is in PATH
-      run: |
-        source ~/.profile
-        cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE
-
-    - name: Build
-      working-directory: ${{runner.workspace}}/build
-      shell: bash
-      # Execute the build.  You can specify a specific target with "--target <NAME>"
-      run: cmake --build . --config $BUILD_TYPE
-
-    - name: Test
-      working-directory: ${{runner.workspace}}/build
-      shell: bash
-      # Execute tests defined by the CMake configuration.  
-      # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
-      run: ctest -C $BUILD_TYPE
\ No newline at end of file

.travis.yml

-language: cpp
-
-install:
-  # Pip cannot install Conan without these upgrades
-  - python3 -m pip install --upgrade pip setuptools
-  # Install Conan and CMake >= 3.15
-  - python3 -m pip install conan cmake
-
-  # Fail if we can't run Conan.
-  - conan --version
-
-jobs:
-  include:
-    - os: osx
-      compiler: gcc
-      osx_image: xcode11.2    # includes gcc-9 by default
-      env:
-        - GCC_VER="9"
-        - MATRIX_EVAL="CC=gcc-${GCC_VER} && CXX=g++-${GCC_VER}"
-    - os: osx
-      compiler: clang
-      osx_image: xcode11.2
-      env:
-        - MATRIX_EVAL=""
-    - os: linux
-      dist: bionic
-      compiler: gcc
-      env:
-        - GCC_VER="9"
-        - MATRIX_EVAL="CC=gcc-${GCC_VER} && CXX=g++-${GCC_VER}"
-
-      addons:
-        apt:
-          sources:
-            - ubuntu-toolchain-r-test
-          packages:
-            # I couldn't get ${GCC_VER} in here successfully
-            - gcc-9
-            - g++-9
-            - doxygen
-            - python3-pip
-      after_script:
-        - bash <(curl -s https://codecov.io/bash) -x /usr/bin/gcov-${GCC_VER}
-    - os: linux
-      dist: bionic
-      compiler: clang
-      env:
-        - MATRIX_EVAL="CC=clang && CXX=clang++"
-      addons: { apt: { packages: ['doxygen', 'python3-pip'] } }
-
-
-before_script:
-  - eval "${MATRIX_EVAL}"
-
-script:
-  - mkdir build
-  - cd build
-  - cmake -D ENABLE_COVERAGE:BOOL=TRUE ../
-  - cmake --build . -- -j2
-  - ctest -j2
-
-
-

appveyor.yml

-image:
-  - Visual Studio 2019
-clone_folder: c:\projects\source
-
-environment:
-    PYTHON: "C:\\Python38-x64\\python.exe"
-
-build_script:
-- cmd: >-
-    mkdir build
-
-    cd build
-
-    set PATH=%PATH%;C:\Users\appveyor\AppData\Roaming\Python\Python38\Scripts
-
-    "%PYTHON%" -m pip install --user conan
-
-    cmake c:\projects\source -G "Visual Studio 16 2019" -DCMAKE_BUILD_TYPE:STRING=Release
-
-    cmake --build . --config "Release"
-
-test_script:
-- cmd: ctest -C Debug
-