Revert as avoiding in test

test/helper.rb

@@ -11,20 +11,16 @@
 Warning[:experimental] = true
 
 Gem.path.each do |path|
-  # https://github.com/ruby/ruby/blob/e5b585ba908d371c67d97988795a5e40ec2f9e93/lib/prettyprint.rb#L184
-  Warning.ignore(/literal string will be frozen in the future/, path)
+  Warning.ignore(//, path)
 end
 
-Warning.process do |warning|
-  # https://bugs.ruby-lang.org/issues/20205
-  # https://github.com/kachick/irb-power_assert/issues/176
-  next :default if RUBY_VERSION >= '3.4' && /literal string will be frozen in the future/.match?(warning)
-
+Warning.process do |_warning|
   :raise
 end
 
 require_relative '../lib/irb-power_assert'
 
+
 class Test::Unit::TestCase
   # Taken from https://github.com/ruby/irb/blob/ad08152c43d4309ee4dec3bbaf361ffc338c1f46/test/lib/minitest/unit.rb#L461-L495, thank you!
   def capture_io