Remove dependency on async-io.

falcon.gemspec

@@ -29,7 +29,6 @@ Gem::Specification.new do |spec|
 	spec.add_dependency "async-container", "~> 0.18"
 	spec.add_dependency "async-http", "~> 0.57"
 	spec.add_dependency "async-http-cache", "~> 0.4.0"
-	spec.add_dependency "async-io", "~> 1.22"
 	spec.add_dependency "async-service", "~> 0.10"
 	spec.add_dependency "bundler"
 	spec.add_dependency "localhost", "~> 1.1"

gems.rb

@@ -7,6 +7,9 @@
 
 gemspec
 
+# gem "async-http", path: "../async-http"
+# gem "async-http", path: "../async-http-native-io"
+# gem "openssl", git: "https://github.com/ruby/openssl.git"
 # gem "async-container", path: "../async-container"
 # gem "async-websocket", path: "../async-websocket"
 # gem "async-http", path: "../async-http"

readme.md

@@ -1,6 +1,6 @@
 # ![Falcon](logo.svg)
 
-Falcon is a multi-process, multi-fiber rack-compatible HTTP server built on top of [async](https://github.com/socketry/async), [async-io](https://github.com/socketry/async-io), [async-container](https://github.com/socketry/async-container) and [async-http](https://github.com/socketry/async-http). Each request is executed within a lightweight fiber and can block on up-stream requests without stalling the entire server process. Falcon supports HTTP/1 and HTTP/2 natively.
+Falcon is a multi-process, multi-fiber rack-compatible HTTP server built on top of [async](https://github.com/socketry/async), [async-container](https://github.com/socketry/async-container) and [async-http](https://github.com/socketry/async-http). Each request is executed within a lightweight fiber and can block on up-stream requests without stalling the entire server process. Falcon supports HTTP/1 and HTTP/2 natively.
 
 [![Development Status](https://github.com/socketry/falcon/workflows/Test/badge.svg)](https://github.com/socketry/falcon/actions?workflow=Test)