app/test: remove useless memset
app/test: remove useless memset

Remove useless memset, since dev_private is created by rte_zmalloc
it must already be zero.

Signed-off-by: Stephen Hemminger <06fa905d7f2aaced6dc72e9511c71a2a51e8aead@networkplumber.org>
Acked-by: Neil Horman <3316dc2d77df57653443c0391a5296176d6ca9c3@tuxdriver.com>

tsphillips/dpdk-fork,venkynv/dpdk-mirror,msune/dpdk,venkynv/dpdk-mirror,john-mcnamara-intel/dpdk,venkynv/dpdk-mirror,john-mcnamara-intel/dpdk,mixja/dpdk,john-mcnamara-intel/dpdk,msune/dpdk,venkynv/dpdk-mirror,tsphillips/dpdk-fork,mixja/dpdk,tsphillips/dpdk-fork,mixja/dpdk,john-mcnamara-intel/dpdk,msune/dpdk,msune/dpdk,mixja/dpdk,tsphillips/dpdk-fork