Remove Net::SSH story helpers usage in FS specs

spec/support/net_ssh_story_helpers.rb

@@ -1,25 +1,8 @@
 module NetSSHStoryHelpers
   require 'net/ssh/test'
+
   include Net::SSH::Test
 
-  # FIXME: must be moved elsewhere or implemented another way/form.
-  class ::Net::SSH::Test::Channel
-    def gets_packet(type, *args)
-      gets_data(sftp_packet(type, *args))
-    end
-
-    def sends_packet(type, *args)
-      sends_data(sftp_packet(type, *args))
-    end
-
-    private
-
-    def sftp_packet(type, *args)
-      data = Net::SSH::Buffer.from(*args)
-      Net::SSH::Buffer.from(:long, data.length + 1, :byte, type, :raw, data).to_s
-    end
-  end
-
   def story_with_new_channel
     story do |session|
       ch = session.opens_channel
@@ -29,22 +12,6 @@ module NetSSHStoryHelpers
     end
   end
 
-  def sftp_story
-    story do |session|
-      ch = session.opens_channel
-      ch.sends_subsystem 'sftp'
-      ch.sends_packet(
-        Net::SFTP::Constants::PacketTypes::FXP_INIT, :long,
-        Net::SFTP::Session::HIGHEST_PROTOCOL_VERSION_SUPPORTED
-      )
-      ch.gets_packet(
-        Net::SFTP::Constants::PacketTypes::FXP_VERSION, :long,
-        Net::SFTP::Session::HIGHEST_PROTOCOL_VERSION_SUPPORTED
-      )
-      yield ch if block_given?
-    end
-  end
-
   def expect_story_completed
     raise 'there is no story to expect' if socket.script.events.empty?
     yield