Revert "Manually merged from https://github.com/rubygems/rubygems/pull/2636"

31a6eaabc1 is obsoleted with
  https://github.com/rubygems/rubygems/pull/3820

lib/rubygems/commands/list_command.rb

@@ -6,7 +6,6 @@ require 'rubygems/query_utils'
 # Searches for gems starting with the supplied argument.
 
 class Gem::Commands::ListCommand < Gem::Command
-
   include Gem::QueryUtils
 
   def initialize
@@ -39,5 +38,4 @@ To search for remote gems use the search command.
   def usage # :nodoc:
     "#{program_name} [REGEXP ...]"
   end
-
 end