[rubygems/rubygems] Drop support for 'gem env packageversion'

be962ca0c4

lib/rubygems/commands/environment_command.rb

@@ -9,7 +9,6 @@ class Gem::Commands::EnvironmentCommand < Gem::Command
 
   def arguments # :nodoc:
     args = <<-EOF
-          packageversion  display the package version
           gemdir          display the path where gems are installed
           gempath         display path used to search for gems
           version         display the gem format version
@@ -76,8 +75,6 @@ lib/rubygems/defaults/operating_system.rb
     arg = options[:args][0]
     out <<
       case arg
-      when /^packageversion/ then
-        Gem::RubyGemsPackageVersion
       when /^version/ then
         Gem::VERSION
       when /^gemdir/, /^gemhome/, /^home/, /^GEM_HOME/ then