Get rid of the upper bound ruby version check.

This check was not being maintained and has been failing with the latest
rubies.  It's not clear what the goal of this check was.

Author: bradleyjames

bin/codedeploy-agent

@@ -1,12 +1,11 @@
 #!/usr/bin/env ruby
 
-ruby_versions = ["2.3", "2.2", "2.1", "2.0"]
+ruby_versions = ["2.4", "2.3", "2.2", "2.1", "2.0"]
 actual_ruby_version = RUBY_VERSION.split('.').map{|s|s.to_i}
 left_bound = '2.0.0'.split('.').map{|s|s.to_i}
-right_bound = '2.3.1'.split('.').map{|s|s.to_i}
 ruby_bin = nil
 
-if (actual_ruby_version <=> left_bound) > -1 && (actual_ruby_version <=> right_bound) < 1
+if (actual_ruby_version <=> left_bound) > -1
   ruby_bin = "ruby"
 else
   ruby_versions.each do |i|
@@ -22,5 +21,5 @@ if ruby_bin
   exec("#{ruby_bin} #{File.join(File.expand_path(File.dirname(__FILE__)), "../lib/codedeploy-agent.rb")} #{ARGV.join(' ')}")
 end
 
-STDERR.puts "No supported ruby version found. Code Deploy Host Agent supports Ruby version of 2.0.x to 2.3.x."
+STDERR.puts "No supported ruby version found. Code Deploy Host Agent supports Ruby version 2.0.x and greater."
 exit(1)