drop termios, it leaves the terminal in a broken state anyway

ruby/myhunt-curses.rb

@@ -6,7 +6,6 @@ require 'bundler/inline'
 gemfile do
   source 'https://rubygems.org'
   gem 'curses'
-  gem 'ruby-termios', require: 'termios'
 end
 
 require 'myhunt'
@@ -58,10 +57,8 @@ def ncurses_main( number_of_mines )
   Curses.noecho
   Curses.stdscr.keypad = true
 
-  orig_termios = Termios.tcgetattr($stdin)
   at_exit do
-    # Curses.close_screen
-    Termios.tcsetattr($stdin, Termios::TCSANOW, orig_termios)
+    Curses.close_screen
   end
 
   display_curses( field )