plugin/kubernetes: remove unnecessary checks (#2124)
plugin/kubernetes: remove unnecessary checks (#2124)

These checks are not needed and also use a var for all obj errors.

Signed-off-by: Miek Gieben <00b357f94cf3a1145a32703fb42e2d80418ab806@miek.nl>
miekg/coredns,ii/coredns,jremond/coredns,coredns/coredns,jremond/coredns,johnbelamaric/coredns,chrisohaver/coredns,miekg/coredns,yongtang/coredns,johnbelamaric/coredns,ii/coredns