tidy modules

Signed-off-by: Raffaele Di Fazio <raffo@github.com>

go.mod

@@ -34,7 +34,6 @@ require (
 	github.com/gorilla/mux v1.7.4 // indirect
 	github.com/hooklift/gowsdl v0.4.0
 	github.com/infobloxopen/infoblox-go-client v1.1.1
-	github.com/jessevdk/go-flags v1.4.0 // indirect
 	github.com/linki/instrumented_http v0.2.0
 	github.com/linode/linodego v0.19.0
 	github.com/maxatome/go-testdeep v1.9.2
@@ -57,8 +56,7 @@ require (
 	github.com/ultradns/ultradns-sdk-go v0.0.0-20200616202852-e62052662f60
 	github.com/vinyldns/go-vinyldns v0.0.0-20200211145900-fe8a3d82e556
 	github.com/vultr/govultr/v2 v2.5.1
-	go.etcd.io/etcd v0.5.0-alpha.5.0.20200401174654-e694b7bb0875
-	go.etcd.io/etcd/api/v3 v3.5.0 // indirect
+	go.etcd.io/etcd/api/v3 v3.5.0
 	go.etcd.io/etcd/client/v3 v3.5.0
 	go.uber.org/ratelimit v0.1.0
 	golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97 // indirect
@@ -68,7 +66,6 @@ require (
 	google.golang.org/api v0.20.0
 	gopkg.in/ns1/ns1-go.v2 v2.0.0-20190322154155-0dafb5275fd1
 	gopkg.in/yaml.v2 v2.4.0
-	honnef.co/go/tools v0.0.1-2020.1.4 // indirect
 	istio.io/api v0.0.0-20210128181506-0c4b8e54850f
 	istio.io/client-go v0.0.0-20210128182905-ee2edd059e02
 	k8s.io/api v0.22.0