Remove duplicated code

lib/vagrant-lxc/driver.rb

@@ -105,22 +105,6 @@ module Vagrant
       end
 
       def assigned_ip
-        ip = ''
-        retryable(:on => LXC::Errors::ExecuteError, :tries => 10, :sleep => 3) do
-          unless ip = get_container_ip_from_ip_addr
-            # retry
-            raise LXC::Errors::ExecuteError, :command => "lxc-attach"
-          end
-        end
-        ip
-      end
-
-      # From: https://github.com/lxc/lxc/blob/staging/src/python-lxc/lxc/__init__.py#L371-L385
-      def get_container_ip_from_ip_addr
-        output = @cli.attach '/sbin/ip', '-4', 'addr', 'show', 'scope', 'global', 'eth0', namespaces: 'network'
-        if output =~ /^\s+inet ([0-9.]+)\/[0-9]+\s+/
-          return $1.to_s
-        end
       end
 
       protected