[ruby/irb] Remove KEYWORD_ALIASES which handled special alias name

of irb_break irb_catch and irb_next command
(https://github.com/ruby/irb/pull/1004)

* Remove KEYWORD_ALIASES which handled special alias name of irb_break irb_catch and irb_next command

* Remove unused instance variable user_aliases

Co-authored-by: Stan Lo <[email protected]>

---------

https://github.com/ruby/irb/commit/f256d7899f

Co-authored-by: Stan Lo <[email protected]>

1 files changed, 1 insertions, 13 deletions

diff --git a/lib/irb/context.rb b/lib/irb/context.rb
index aa0c60b0e3..fafe99d57b 100644
--- a/lib/irb/context.rb
+++ b/lib/irb/context.rb
@@ -149,8 +149,7 @@ module IRB
         @newline_before_multiline_output = true
       end
 
-      @user_aliases = IRB.conf[:COMMAND_ALIASES].dup
-      @command_aliases = @user_aliases.merge(KEYWORD_ALIASES)
+      @command_aliases = IRB.conf[:COMMAND_ALIASES].dup
     end
 
     private def term_interactive?
@@ -158,17 +157,6 @@ module IRB
       STDIN.tty? && ENV['TERM'] != 'dumb'
     end
 
-    # because all input will eventually be evaluated as Ruby code,
-    # command names that conflict with Ruby keywords need special workaround
-    # we can remove them once we implemented a better command system for IRB
-    KEYWORD_ALIASES = {
-      :break => :irb_break,
-      :catch => :irb_catch,
-      :next => :irb_next,
-    }.freeze
-
-    private_constant :KEYWORD_ALIASES
-
     def use_tracer=(val)
       require_relative "ext/tracer" if val
       IRB.conf[:USE_TRACER] = val