Up deadline, remove redundant linters

Author: Matthew Wong

repo-infra/verify/go-tools/verify-gometalinter.sh

@@ -17,10 +17,9 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-cmd='gometalinter --deadline=50s --vendor
+cmd='gometalinter --deadline=180s --vendor
   --cyclo-over=50 --dupl-threshold=100
   --disable-all
-  --enable=vet
   --enable=deadcode
   --enable=vetshadow
   --enable=gocyclo