drop STDIN.tty? hack

this was necessary to get older version of highline up and running in rails
see #178 df5cffb

spec/spec_helper.rb

@@ -3,18 +3,6 @@
   SimpleCov.start
 end
 
-# In GitHub Actions (CI), we do not have a tty, so the various tests that use
-# STDIN in order to test interactivity will fail. This code creates a psuedo-tty
-# in that environment. If you want to test locally in a "non-tty" way, you can
-# run the tests as follows: `true | bundle exec rake 2>&1 | cat`
-unless STDIN.tty?
-  require "pty"
-  require "io/console"
-  _master_io, slave_file = PTY.open
-  slave_file.raw!
-  STDIN.reopen(slave_file)
-end
-
 require "manageiq-appliance_console"
 ManageIQ::ApplianceConsole.logger = Logger.new("/dev/null")