Replace 'Will listen on all interfaces' warning

The warning probably didn't make sense to many users and may have
sounded ominous.

Instead, inform user how to disable sharing after listing sharing URLs.

Signed-off-by: Anurag Priyam <anurag08priyam@gmail.com>

Author: yeban

lib/sequenceserver.rb

@@ -116,7 +116,6 @@ def call(env)
 
     # Run SequenceServer using WEBrick.
     def run
-      check_host
       Server.run(self)
     rescue Errno::EADDRINUSE
       puts "** Could not bind to port #{config[:port]}."
@@ -140,6 +139,7 @@ def on_start
         puts '   To share your setup, please try one of the following: '
         puts "     -  http://#{ip_address}:#{config[:port]}"
         puts "     -  http://#{hostname}:#{config[:port]}" if hostname
+        puts '   To disable sharing, set :host: key in config file to 127.0.0.1'
       end
       puts '   Press CTRL+C to quit.'
       open_in_browser(server_url)
@@ -216,16 +216,6 @@ def check_num_threads
       raise NUM_THREADS_INCORRECT
     end
 
-    # Check and warn user if host is 0.0.0.0 (default).
-    def check_host
-      # rubocop:disable Style/GuardClause
-      if config[:host] == '0.0.0.0'
-        logger.warn 'Will listen on all interfaces (0.0.0.0).' \
-                    ' Consider using 127.0.0.1 (--host option).'
-      end
-      # rubocop:enable Style/GuardClause
-    end
-
     def load_extension
       return unless config[:require]