Drop valgrind

Gemfile

@@ -38,7 +38,6 @@ group :profilers do
   gem 'stackprof'
   gem 'memory_profiler'
   gem 'benchmark-ips'
-  gem "ruby_memcheck", platform: :ruby
 end
 
 # Test gems

Gemfile.lock

@@ -92,7 +92,6 @@ GEM
     logger (1.7.0)
     marcel (1.1.0)
     memory_profiler (1.1.0)
-    mini_portile2 (2.8.9)
     minitest (6.0.1)
       prism (~> 1.5)
     minitest-mock (5.27.0)
@@ -102,9 +101,6 @@ GEM
     net-smtp (0.5.1)
       net-protocol
     nkf (0.2.0)
-    nokogiri (1.19.0)
-      mini_portile2 (~> 2.8.2)
-      racc (~> 1.4)
     ostruct (0.6.3)
     parallel (1.27.0)
     parser (3.3.10.1)
@@ -173,8 +169,6 @@ GEM
       lint_roller (~> 1.1)
       rubocop (~> 1.72, >= 1.72.1)
     ruby-progressbar (1.13.0)
-    ruby_memcheck (3.0.1)
-      nokogiri
     securerandom (0.4.1)
     stackprof (0.2.27)
     stringio (3.2.0)
@@ -231,7 +225,6 @@ DEPENDENCIES
   rubocop
   rubocop-on-rbs
   rubocop-rubycw
-  ruby_memcheck
   stackprof
   steep!
   tempfile

Rakefile

@@ -35,18 +35,6 @@ end
 
 Rake::TestTask.new(test: :compile, &test_config)
 
-unless Gem.win_platform?
-  begin
-    require "ruby_memcheck"
-
-    namespace :test do
-      RubyMemcheck::TestTask.new(valgrind: :compile, &test_config)
-    end
-  rescue LoadError => exn
-    STDERR.puts "🚨🚨🚨🚨 Skipping RubyMemcheck: #{exn.inspect} 🚨🚨🚨🚨"
-  end
-end
-
 multitask :default => [:test, :stdlib_test, :typecheck_test, :rubocop, :validate, :test_doc]
 
 task :lexer do