Remove `list_command` settingshow_command_deprecation_pass

The list command was still present (just aliased to `bundle show`), even
if the setting was set to false. So the setting was at least super
confusing if not just wrong.

It also led to misleading situations such as

```
$ bundle list --help

(...)

NAME
       bundle-list - List all the gems in the bundle

SYNOPSIS
       bundle list [--name-only] [--paths] [--without-group=GROUP] [--only-group=GROUP]

(...)

$ bundle list --only-group=development
Unknown switches '--only-group=development'
```

So, instead, I enable the new list command _always_ and remove the
`bundle list => bundle show` alias.

5 files changed, 13 insertions, 19 deletions

diff --git a/lib/bundler/cli.rb b/lib/bundler/cli.rb
index a8ae5ffc3e..a62750746f 100644
--- a/lib/bundler/cli.rb
+++ b/lib/bundler/cli.rb
@@ -282,19 +282,19 @@ module Bundler
       end
     end
 
-    if Bundler.feature_flag.list_command?
-      desc "list", "List all gems in the bundle"
-      method_option "name-only", :type => :boolean, :banner => "print only the gem names"
-      method_option "only-group", :type => :string, :banner => "print gems from a particular group"
-      method_option "without-group", :type => :string, :banner => "print all gems expect from a group"
-      method_option "paths", :type => :boolean, :banner => "print the path to each gem in the bundle"
-      def list
-        require "bundler/cli/list"
-        List.new(options).run
-      end
+    desc "list", "List all gems in the bundle"
+    method_option "name-only", :type => :boolean, :banner => "print only the gem names"
+    method_option "only-group", :type => :string, :banner => "print gems from a particular group"
+    method_option "without-group", :type => :string, :banner => "print all gems expect from a group"
+    method_option "paths", :type => :boolean, :banner => "print the path to each gem in the bundle"
+    def list
+      require "bundler/cli/list"
+      List.new(options).run
+    end
 
-      map %w[ls] => "list"
-    else
+    map %w[ls] => "list"
+
+    unless Bundler.feature_flag.bundler_3_mode?
       desc "show GEM [OPTIONS]", "Shows all gems that are part of the bundle, or the path to a given gem"
       long_desc <<-D
         Show lists the names and versions of all gems that are required by your Gemfile.
@@ -327,8 +327,6 @@ module Bundler
         require "bundler/cli/show"
         Show.new(options, gem_name).run
       end
-
-      map %w[list] => "show"
     end
 
     desc "info GEM [OPTIONS]", "Show information for the given gem"
diff --git a/lib/bundler/feature_flag.rb b/lib/bundler/feature_flag.rb
index fc3da1bbf4..04d8272195 100644
--- a/lib/bundler/feature_flag.rb
+++ b/lib/bundler/feature_flag.rb
@@ -41,7 +41,6 @@ module Bundler
     settings_flag(:global_path_appends_ruby_scope) { bundler_2_mode? }
     settings_flag(:global_gem_cache) { bundler_2_mode? }
     settings_flag(:init_gems_rb) { bundler_2_mode? }
-    settings_flag(:list_command) { bundler_3_mode? }
     settings_flag(:lockfile_uses_separate_rubygems_sources) { bundler_2_mode? }
     settings_flag(:only_update_to_newer_versions) { bundler_2_mode? }
     settings_flag(:path_relative_to_cwd) { bundler_2_mode? }
diff --git a/lib/bundler/settings.rb b/lib/bundler/settings.rb
index a1c0825d39..bf709f712b 100644
--- a/lib/bundler/settings.rb
+++ b/lib/bundler/settings.rb
@@ -39,7 +39,6 @@ module Bundler
       global_gem_cache
       ignore_messages
       init_gems_rb
-      list_command
       lockfile_uses_separate_rubygems_sources
       no_install
       no_prune
diff --git a/man/bundle-config.ronn b/man/bundle-config.ronn
index 9dc2edbf2a..4e717b4b69 100644
--- a/man/bundle-config.ronn
+++ b/man/bundle-config.ronn
@@ -214,8 +214,6 @@ learn more about their operation in [bundle install(1)](bundle-install.1.html).
    Generate a `gems.rb` instead of a `Gemfile` when running `bundle init`.
 * `jobs` (`BUNDLE_JOBS`):
    The number of gems Bundler can install in parallel. Defaults to 1.
-* `list_command` (`BUNDLE_LIST_COMMAND`)
-   Enable new list command feature
 * `no_install` (`BUNDLE_NO_INSTALL`):
    Whether `bundle package` should skip installing gems.
 * `no_prune` (`BUNDLE_NO_PRUNE`):
diff --git a/spec/commands/list_spec.rb b/spec/commands/list_spec.rb
index c988d16d3a..613249cc59 100644
--- a/spec/commands/list_spec.rb
+++ b/spec/commands/list_spec.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-RSpec.describe "bundle list", :bundler => "3" do
+RSpec.describe "bundle list", :bundler => ">= 2" do
   before do
     install_gemfile <<-G
       source "file://#{gem_repo1}"