utils/ping: remove unnecessary function
utils/ping: remove unnecessary function

This patch removes unneeded functions that are not in use.

Change-Id: I426f3d0e37c3c96dcb67d29e664b3e411d4b4237
Signed-off-by: Junhwan Park <7fee488b6f78fc50b291ffc7d10428788977e877@samsung.com>

JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT