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diff --git a/lib/irb/lc/help-message b/lib/irb/lc/help-message
deleted file mode 100644
index 7e66100be9..0000000000
--- a/lib/irb/lc/help-message
+++ /dev/null
@@ -1,51 +0,0 @@
-Usage:  irb.rb [options] [programfile] [arguments]
-  -f                Don't initialize from configuration file.
-  -d                Set $DEBUG and $VERBOSE to true (same as 'ruby -d').
-  -r load-module    Require load-module (same as 'ruby -r').
-  -I path           Specify $LOAD_PATH directory (same as 'ruby -I').
-  -U                Set external and internal encodings to UTF-8.
-  -E ex[:in]        Set default external (ex) and internal (in) encodings
-                    (same as 'ruby -E').
-  -w                Suppress warnings (same as 'ruby -w').
-  -W[level=2]       Set warning level: 0=silence, 1=medium, 2=verbose
-                    (same as 'ruby -W').
-  --context-mode n  Set n[0-4] to method to create Binding Object,
-                    when new workspace was created.
-  --extra-doc-dir   Add an extra doc dir for the doc dialog.
-  --echo            Show result (default).
-  --noecho          Don't show result.
-  --echo-on-assignment
-                    Show result on assignment.
-  --noecho-on-assignment
-                    Don't show result on assignment.
-  --truncate-echo-on-assignment
-                    Show truncated result on assignment (default).
-  --inspect         Use 'inspect' for output.
-  --noinspect       Don't use 'inspect' for output.
-  --multiline       Use multiline editor module (default).
-  --nomultiline     Don't use multiline editor module.
-  --singleline      Use single line editor module.
-  --nosingleline    Don't use single line editor module (default).
-  --colorize        Use color-highlighting (default).
-  --nocolorize      Don't use color-highlighting.
-  --autocomplete    Use auto-completion (default).
-  --noautocomplete  Don't use auto-completion.
-  --prompt prompt-mode, --prompt-mode prompt-mode
-                    Set prompt mode. Pre-defined prompt modes are:
-                    'default', 'classic', 'simple', 'inf-ruby', 'xmp', 'null'.
-  --inf-ruby-mode   Use prompt appropriate for inf-ruby-mode on emacs.
-                    Suppresses --multiline and --singleline.
-  --sample-book-mode, --simple-prompt
-                    Set prompt mode to 'simple'.
-  --noprompt        Don't output prompt.
-  --script          Script mode (default, treat first argument as script)
-  --noscript        No script mode (leave arguments in argv)
-  --single-irb      Share self with sub-irb.
-  --tracer          Show stack trace for each command.
-  --back-trace-limit n[=16]
-                    Display backtrace top n and bottom n.
-  --verbose         Show details.
-  --noverbose       Don't show details.
-  -v, --version     Print the version of irb.
-  -h, --help        Print help.
-  --                Separate options of irb from the list of command-line args.