LU-2335 lnet: remove empty file lnet/lnet/api-errno.c

LU-2335 lnet: remove empty file lnet/lnet/api-errno.c

The file is empty. We can just remove it.

Signed-off-by: Peng Tao <tao.peng@emc.com>
Change-Id: I7d46874dde5581d48ea582031df0f33a937870da
Reviewed-on: http://review.whamcloud.com/5880
Tested-by: Hudson
Reviewed-by: Liang Zhen <liang.zhen@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Li Wei <wei.g.li@intel.com>
Reviewed-by: Isaac Huang <he.huang@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>