[ruby/irb] Drop unnecessary pends for truffleruby

https://github.com/ruby/irb/commit/2517039812

test/irb/test_cmd.rb

@@ -858,7 +858,7 @@ module TestIRB
 
     def test_edit_with_constant
       # const_source_location is supported after Ruby 2.7
-      omit if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.7.0') || RUBY_ENGINE == 'truffleruby'
+      omit if Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.7.0')
 
       out, err = execute_lines(
         "edit IRB::Irb"

test/irb/test_workspace.rb

@@ -83,7 +83,6 @@ module TestIRB
 
 
     def test_toplevel_binding_local_variables
-      pend if RUBY_ENGINE == 'truffleruby'
       bug17623 = '[ruby-core:102468]'
       bundle_exec = ENV.key?('BUNDLE_GEMFILE') ? ['-rbundler/setup'] : []
       top_srcdir = "#{__dir__}/../.."