Skip validating rbs

Author: soutaro

Rakefile

@@ -60,6 +60,8 @@ task :validate => :compile do
 
   libs = FileList["stdlib/*"].map {|path| File.basename(path).to_s }
 
+  libs.delete "rbs"
+
   # Skip RBS validation because Ruby CI runs without rubygems
   case skip_rbs_validation = ENV["SKIP_RBS_VALIDATION"]
   when nil
@@ -90,7 +92,7 @@ task :stdlib_test => :compile do
   if ENV["RANDOMIZE_STDLIB_TEST_ORDER"] == "true"
     test_files.shuffle!
   end
-  
+
   sh "#{ruby} -Ilib #{bin}/test_runner.rb #{test_files.join(' ')}"
   # TODO: Ractor tests need to be run in a separate process
   sh "#{ruby} -Ilib #{bin}/test_runner.rb test/stdlib/Ractor_test.rb"