Remove `builder` gem requirement for `gem regenerate_index`

This requirement was introduced 14 years ago in
7ce7039b390440754954df5efea619e9f57ef823, and I don't think it's
necessary anymore. I made several tests introducing UTF-8 characters in
gemspec files and generating indexes out of them, and couldn't find any
issues. Gemspecs are read with UTF-8 encoding these days.

3 files changed, 2 insertions, 12 deletions

diff --git a/test/rubygems/test_gem_commands_generate_index_command.rb b/test/rubygems/test_gem_commands_generate_index_command.rb
index d8fda32fc0..6b69bcf353 100644
--- a/test/rubygems/test_gem_commands_generate_index_command.rb
+++ b/test/rubygems/test_gem_commands_generate_index_command.rb
@@ -3,10 +3,6 @@ require 'rubygems/test_case'
 require 'rubygems/indexer'
 require 'rubygems/commands/generate_index_command'
 
-unless defined?(Builder::XChar)
-  warn "generate_index tests are being skipped.  Install builder gem."
-end
-
 class TestGemCommandsGenerateIndexCommand < Gem::TestCase
 
   def setup
@@ -83,4 +79,4 @@ class TestGemCommandsGenerateIndexCommand < Gem::TestCase
       @ui.error
   end
 
-end if defined?(Builder::XChar)
+end
diff --git a/test/rubygems/test_gem_indexer.rb b/test/rubygems/test_gem_indexer.rb
index d5f28b8814..f20e3c5112 100644
--- a/test/rubygems/test_gem_indexer.rb
+++ b/test/rubygems/test_gem_indexer.rb
@@ -2,10 +2,6 @@
 require 'rubygems/test_case'
 require 'rubygems/indexer'
 
-unless defined?(Builder::XChar)
-  warn "Gem::Indexer tests are being skipped.  Install builder gem."
-end
-
 class TestGemIndexer < Gem::TestCase
 
   def setup
@@ -360,4 +356,4 @@ class TestGemIndexer < Gem::TestCase
     refute File.exist?(file), "#{file} exists"
   end
 
-end if defined?(Builder::XChar)
+end
diff --git a/test/rubygems/test_gem_source.rb b/test/rubygems/test_gem_source.rb
index 24b8edb055..88e89bd192 100644
--- a/test/rubygems/test_gem_source.rb
+++ b/test/rubygems/test_gem_source.rb
@@ -55,8 +55,6 @@ class TestGemSource < Gem::TestCase
   end
 
   def test_dependency_resolver_set_file_uri
-    skip 'install builder gem' unless defined? Builder::XChar
-
     Gem::Indexer.new(@tempdir).generate_index
 
     source = Gem::Source.new "file://#{@tempdir}/"