remove_constant

# File activesupport/lib/active_support/dependencies.rb, line 581
    def remove_constant(const) #:nodoc:
      return false unless qualified_const_defined? const

      const = $1 if /\A::(.*)\Z/ =~ const.to_s
      names = const.to_s.split('::')
      if names.size == 1 # It's under Object
        parent = Object
      else
        parent = (names[0..-2] * '::').constantize
      end

      log "removing constant #{const}"
      parent.instance_eval { remove_const names.last }
      return true
    end