Remove reference to ruby_debug (#9142)

Add conflicts_ok to ruby_concurrent_ruby

packages/buildessential.rb

@@ -3,7 +3,7 @@ require 'package'
 class Buildessential < Package
   description 'A collection of tools essential to compile and build software.'
   homepage 'SKIP'
-  version '1.26'
+  version '1.27'
   license 'GPL-3+'
   compatibility 'all'
 
@@ -169,8 +169,6 @@ class Buildessential < Package
   # Add rubocop for linting packages. (This also installs the
   # rubocop config file.)
   depends_on 'ruby_rubocop'
-  # Add ruby_debug
-  depends_on 'ruby_debug'
   # Add ruby_concurrent_ruby
   depends_on 'ruby_concurrent_ruby'
 end

packages/ruby_concurrent_ruby.rb

@@ -7,4 +7,6 @@ class Ruby_concurrent_ruby < RUBY
   license 'MIT'
   compatibility 'all'
   source_url 'SKIP'
+
+  conflicts_ok
 end