diff --git a/.appveyor.yml b/.appveyor.yml
deleted file mode 100644
index 2e66aa5ca..000000000
--- a/.appveyor.yml
+++ /dev/null
@@ -1,39 +0,0 @@
-version: 2.3.2.{build}
-
-branches:
-  only:
-    - main
-    - v1
-
-install:
-  - git submodule update --init --recursive
-  - py -3 --version
-  - set PATH=C:\Python38-x64;C:\Python38-x64\Scripts;%PATH%
-  - cmake --version
-  - python --version
-  - python -m pip --version
-  - python -m pip install conan
-  - conan user
-  - conan --version
-
-build_script:
-  - mkdir build
-  - cd build
-  - ps:
-      cmake .. -DCLI11_WARNINGS_AS_ERRORS=ON -DCLI11_SINGLE_FILE_TESTS=ON
-      -DCMAKE_BUILD_TYPE=Debug -DCMAKE_GENERATOR="Visual Studio 14 2015"
-  - ps: cmake --build .
-  - cd ..
-  - ps: set CTEST_OUTPUT_ON_FAILURE=1
-  - conan create . CLIUtils/CLI11
-
-test_script:
-  - cd build
-  - ps: ctest --output-on-failure -C Debug
-
-notifications:
-  - provider: Webhook
-    url: https://webhooks.gitter.im/e/0185e91c5d989a476d7b
-    on_build_success: false
-    on_build_failure: true
-    on_build_status_changed: true
diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index 7d376345b..93b7651cc 100644
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -60,19 +60,6 @@ name, pre-commit):
 pre-commit install
 ```
 
-## For developers releasing to Conan.io
-
-This is now done by the CI system on tagged releases. Previously, the steps to
-make a Conan.io release were:
-
-```bash
-conan remove '*' # optional, I like to be clean
-conan create . cliutils/stable
-conan upload "*" -r cli11 --all
-```
-
-Here I've assumed that the remote is `cli11`.
-
 ## For maintainers: remember to add contributions
 
 In a commit to a PR, just add
diff --git a/conanfile.py b/conanfile.py
deleted file mode 100644
index b5b9e490a..000000000
--- a/conanfile.py
+++ /dev/null
@@ -1,49 +0,0 @@
-from conans import ConanFile, CMake
-from conans.tools import load, cross_building
-import re
-
-
-def get_version():
-    try:
-        content = load("include/CLI/Version.hpp")
-        version = re.search(r'#define CLI11_VERSION "(.*)"', content).group(1)
-        return version
-    except Exception:
-        return None
-
-
-class CLI11Conan(ConanFile):
-    name = "CLI11"
-    version = get_version()
-    description = "Command Line Interface toolkit for C++11"
-    topics = ("cli", "c++11", "parser", "cli11")
-    url = "https://github.com/CLIUtils/CLI11"
-    homepage = "https://github.com/CLIUtils/CLI11"
-    author = "Henry Schreiner <hschrein@cern.ch>"
-    license = "BSD-3-Clause"
-
-    settings = "os", "compiler", "arch", "build_type"
-    exports_sources = (
-        "LICENSE",
-        "README.md",
-        "include/*",
-        "src/*",
-        "extern/*",
-        "cmake/*",
-        "CMakeLists.txt",
-        "CLI11.CPack.Description.txt",
-        "tests/*",
-    )
-
-    def build(self):  # this is not building a library, just tests
-        cmake = CMake(self)
-        cmake.definitions["CLI11_BUILD_EXAMPLES"] = "OFF"
-        cmake.definitions["CLI11_SINGLE_FILE"] = "OFF"
-        cmake.configure()
-        cmake.build()
-        if not cross_building(self.settings):
-            cmake.test()
-        cmake.install()
-
-    def package_id(self):
-        self.info.header_only()
diff --git a/test_package/CMakeLists.txt b/test_package/CMakeLists.txt
deleted file mode 100644
index 48f6d9903..000000000
--- a/test_package/CMakeLists.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-project(PackageTest CXX)
-cmake_minimum_required(VERSION 3.1)
-
-include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
-conan_basic_setup()
-
-set(CMAKE_CXX_STANDARD 11)
-set(CMAKE_CXX_EXTENSIONS OFF)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-
-message(STATUS "${CMAKE_PREFIX_PATH}")
-
-find_package(CLI11 CONFIG REQUIRED)
-
-add_executable(example example.cpp)
-target_link_libraries(example CLI11::CLI11)
diff --git a/test_package/conanfile.py b/test_package/conanfile.py
deleted file mode 100644
index 4c5c028ec..000000000
--- a/test_package/conanfile.py
+++ /dev/null
@@ -1,21 +0,0 @@
-from conans import ConanFile, CMake, tools
-import os
-
-
-class HelloTestConan(ConanFile):
-    settings = "os", "compiler", "build_type", "arch"
-    generators = "cmake"
-
-    def build(self):
-        cmake = CMake(self)
-        cmake.configure()
-        cmake.build()
-
-    def imports(self):
-        self.copy("*.dll", dst="bin", src="bin")
-        self.copy("*.dylib*", dst="bin", src="lib")
-
-    def test(self):
-        if not tools.cross_building(self.settings):
-            os.chdir("bin")
-            self.run(".%sexample" % os.sep)
diff --git a/test_package/example.cpp b/test_package/example.cpp
deleted file mode 100644
index 464cf7518..000000000
--- a/test_package/example.cpp
+++ /dev/null
@@ -1,20 +0,0 @@
-// This file is a "Hello, world!" CLI11 program
-
-#include "CLI/CLI.hpp"
-
-#include <iostream>
-
-int main(int argc, char **argv) {
-
-    CLI::App app("Some nice description");
-
-    int x = 0;
-    app.add_option("-x", x, "an integer value")->capture_default_str();
-
-    bool flag;
-    app.add_flag("-f,--flag", flag, "a flag option");
-
-    CLI11_PARSE(app, argc, argv);
-
-    return 0;
-}