Remove the `gem` command.

plugins/commands/gem/command.rb

@@ -1,39 +0,0 @@
-require "rubygems"
-require "rubygems/gem_runner"
-
-require "vagrant/util/safe_puts"
-
-module VagrantPlugins
-  module CommandGem
-    class Command < Vagrant.plugin("2", :command)
-      include Vagrant::Util::SafePuts
-
-      def execute
-        # Bundler sets up its own custom gem load paths such that our
-        # own gems are never loaded. Therefore, give an error if a user
-        # tries to install gems while within a Bundler-managed environment.
-        if defined?(Bundler)
-          require 'bundler/shared_helpers'
-          if Bundler::SharedHelpers.in_bundle?
-            raise Vagrant::Errors::GemCommandInBundler
-          end
-        end
-
-        # If the user needs some help, we add our own little message at the
-        # top so that they're aware of what `vagrant gem` is doing, really.
-        if @argv.empty? || @argv.include?("-h") || @argv.include?("--help")
-          @env.ui.info(I18n.t("vagrant.commands.gem.help_preamble"),
-                       :prefix => false)
-          safe_puts
-        end
-
-        # We just proxy the arguments onto a real RubyGems command
-        # but change `GEM_HOME` so that the gems are installed into
-        # our own private gem folder.
-        ENV["GEM_HOME"] = @env.gems_path.to_s
-        ::Gem.clear_paths
-        ::Gem::GemRunner.new.run(@argv.dup)
-      end
-    end
-  end
-end

plugins/commands/gem/plugin.rb

@@ -1,18 +0,0 @@
-require "vagrant"
-
-module VagrantPlugins
-  module CommandGem
-    class Plugin < Vagrant.plugin("2")
-      name "gem command"
-      description <<-DESC
-      Provides an interface to RubyGems that can be used to install
-      RubyGems into the Vagrant environment.
-      DESC
-
-      command("gem") do
-        require File.expand_path("../command", __FILE__)
-        Command
-      end
-    end
-  end
-end