From 765a19ab593b481f262a07be5d88484f820da3c2 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Sun, 2 Jul 2023 00:19:01 +0900
Subject: [ruby/psych] Remove private methods unused since #487

https://github.com/ruby/psych/commit/902c292f26
---
 ext/psych/lib/psych.rb | 15 ---------------
 1 file changed, 15 deletions(-)

diff --git a/ext/psych/lib/psych.rb b/ext/psych/lib/psych.rb
index 4a2ab58514..9e21325cff 100644
--- a/ext/psych/lib/psych.rb
+++ b/ext/psych/lib/psych.rb
@@ -694,21 +694,6 @@ module Psych
     dump_tags[klass] = tag
   end
 
-  # Workaround for emulating `warn '...', uplevel: 1` in Ruby 2.4 or lower.
-  def self.warn_with_uplevel(message, uplevel: 1)
-    at = parse_caller(caller[uplevel]).join(':')
-    warn "#{at}: #{message}"
-  end
-
-  def self.parse_caller(at)
-    if /^(.+?):(\d+)(?::in `.*')?/ =~ at
-      file = $1
-      line = $2.to_i
-      [file, line]
-    end
-  end
-  private_class_method :warn_with_uplevel, :parse_caller
-
   class << self
     if defined?(Ractor)
       require 'forwardable'
-- 
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