remove unnecessary setNetworkPlugin func (#2601)
remove unnecessary setNetworkPlugin func (#2601)


Azure/acs-engine,rjtsdl/acs-engine,rjtsdl/acs-engine,rjtsdl/acs-engine,Azure/acs-engine,jackfrancis/acs-engine,rjtsdl/acs-engine,jackfrancis/acs-engine,jackfrancis/acs-engine,rjtsdl/acs-engine,Azure/acs-engine,Azure/acs-engine,jackfrancis/acs-engine,Azure/acs-engine,jackfrancis/acs-engine