[ruby/prism] Only run ripper tests on 3.3+

https://github.com/ruby/prism/commit/f8b973e8cd

lib/prism/translation/ripper.rb

@@ -903,21 +903,13 @@ module Prism
           if node.locals.any?
             visit_all(node.locals)
           else
-            visit_block_parameters_node_empty_locals
+            false
           end
 
         bounds(node.location)
         on_block_var(parameters, locals)
       end
 
-      if RUBY_ENGINE == "jruby"
-        # For JRuby, empty locals in an on_block_var is nil.
-        private def visit_block_parameters_node_empty_locals; nil; end
-      else
-        # For everyone else, empty locals in an on_block_var is false.
-        private def visit_block_parameters_node_empty_locals; false; end
-      end
-
       # break
       # ^^^^^
       #

lib/prism/translation/ripper/sexp.rb

@@ -44,7 +44,6 @@ module Prism
           module_eval(<<-End, __FILE__, __LINE__ + 1)
             def on_#{event}(*args)
               args.unshift :#{event}
-              args
             end
           End
         end

test/prism/ripper_test.rb

@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+return if RUBY_VERSION < "3.3"
+
 require_relative "test_helper"
 
 module Prism
@@ -52,10 +54,13 @@ module Prism
     relatives.each do |relative|
       # Skip the tests that Ripper is reporting the wrong results for.
       next if incorrect.include?(relative)
+
+      # Skip the tests we haven't implemented yet.
+      next if omitted.include?(relative)
+
       filepath = File.join(__dir__, "fixtures", relative)
 
       define_method "test_ripper_#{relative}" do
-        omit("Not yet implemented") if omitted.include?(relative)
         source = File.read(filepath, binmode: true, external_encoding: Encoding::UTF_8)
 
         case relative