Remove unused InputMethod#initialize (#635)

* Remove unused InputMethod#initialize The constructor takes a `file_name` argument, but it is never used. The only input method that needs a file is `FileInputMethod`, which has its own constructor to take a file object directly. So the constructor in `InputMethod` is not needed and its child classes don't need to call `super` in their constructors. * Remove unused FileInputMethod#file_name

Author: st0012

lib/irb/input-method.rb

@@ -9,16 +9,7 @@
 require 'reline'
 
 module IRB
- STDIN_FILE_NAME = "(line)" # :nodoc:
  class InputMethod
-
- # Creates a new input method object
- def initialize(file = STDIN_FILE_NAME)
- @file_name = file
- end
- # The file name of this input method, usually given during initialization.
- attr_reader :file_name
-
  # The irb prompt associated with this input method
  attr_accessor :prompt
 
@@ -59,7 +50,6 @@ def inspect
  class StdioInputMethod < InputMethod
  # Creates a new input method object
  def initialize
- super
  @line_no = 0
  @line = []
  @stdin = IO.open(STDIN.to_i, :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")
@@ -133,12 +123,9 @@ def open(file, &block)
 
  # Creates a new input method object
  def initialize(file)
- super
  @io = file.is_a?(IO) ? file : File.open(file)
  @external_encoding = @io.external_encoding
  end
- # The file name of this input method, usually given during initialization.
- attr_reader :file_name
 
  # Whether the end of this input method has been reached, returns +true+ if
  # there is no more data to read.
@@ -186,7 +173,6 @@ def initialize
  if Readline.respond_to?(:encoding_system_needs)
  IRB.__send__(:set_encoding, Readline.encoding_system_needs.name, override: false)
  end
- super
 
  @line_no = 0
  @line = []
@@ -267,7 +253,6 @@ class RelineInputMethod < InputMethod
  # Creates a new input method object using Reline
  def initialize
  IRB.__send__(:set_encoding, Reline.encoding_system_needs.name, override: false)
- super
 
  @line_no = 0
  @line = []

test/irb/helper.rb

@@ -22,7 +22,6 @@ class TestInputMethod < ::IRB::InputMethod
  attr_reader :list, :line_no
 
  def initialize(list = [])
- super("test")
  @line_no = 0
  @list = list
  end