kdig: remove redundant include

6 jobs for master in 23 minutes and 18 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Configure
passed configure:debian:stretch:amd64 #5053
docker linux amd64

00:07:18

passed configure:ubuntu:amd64 #5052
docker linux amd64

00:05:31

 
  Build
passed build:debian:stretch:amd64 #5055
docker linux amd64

00:09:26

passed build:ubuntu:amd64 #5054
docker linux amd64

00:07:31

 
  Test
passed test:debian:stretch:amd64 #5057
docker linux amd64

00:06:33

passed test:ubuntu:amd64 #5056
docker linux amd64

00:05:00