Remove obsolete legacy upgrade script

package/gluon-legacy/files/lib/gluon/upgrade/core/legacy/011-gluon-network

-#!/usr/bin/lua
-
-local sysconfig = require 'gluon.sysconfig'
-local platform = require 'gluon.platform'
-
-local uci = require('luci.model.uci').cursor()
-local util = require 'luci.util'
-
-local nixio = require 'nixio'
-
-
-if platform.match('ar71xx', 'generic', {'tl-wr1043nd', 'tl-wdr3600', 'tl-wdr4300'}) then
-   -- fix up duplicate mac addresses
-   local m1, m2, m3, m4, m5, m6 = string.match(sysconfig.primary_mac, '(%x%x):(%x%x):(%x%x):(%x%x):(%x%x):(%x%x)')
-   m1 = nixio.bit.bor(tonumber(m1, 16), 0x02)
-   m4 = (tonumber(m4, 16)+1) % 0x100
-   m6 = (tonumber(m6, 16)+1) % 0x100
-   local wanaddr = string.format('%02x:%s:%s:%02x:%s:%02x', m1, m2, m3, m4, m5, m6)
-
-   uci:set('network', 'wan', 'macaddr', wanaddr)
-end
-
-uci:save('network')
-uci:commit('network')