Use RegexpCompletor directly. Not through class method of InputComple…

…tor.

lib/irb/completion.rb

@@ -10,8 +10,6 @@
 module IRB
   module InputCompletor # :nodoc:
 
-    BASIC_WORD_BREAK_CHARACTERS = " \t\n`><=;|&{("
-
     GEM_PATHS =
       if defined?(Gem::Specification)
         Gem::Specification.latest_specs(true).map { |s|
@@ -62,22 +60,5 @@ def self.retrieve_files_to_require_relative_from_current_dir
         path.sub(/\.(rb|#{RbConfig::CONFIG['DLEXT']})\z/, '')
       }
     end
-
-    def self.completor_class
-      require_relative 'completion/regexp_completor'
-      RegexpCompletor
-    end
-
-    def self.retrieve_completion_candidates(target, preposing, postposing, bind:)
-      # This method is always called before retrieve_completion_doc_namespace.
-      # To use preposing, postposing and binding information in those methods,
-      # We need to store them as an instance of completor_class into @completor.
-      @completor = completor_class.new(target, preposing, postposing, bind: bind)
-      @completor.completion_candidates
-    end
-
-    def self.retrieve_completion_doc_namespace(target)
-      @completor.doc_namespace(target)
-    end
   end
 end