Add unused code linter

.golangci.yml

@@ -11,3 +11,4 @@ linters:
     - golint
     - goconst
     - goimports
+    - unused

go.mod

@@ -5,7 +5,6 @@ go 1.12
 require (
 	contrib.go.opencensus.io/exporter/jaeger v0.1.0
 	contrib.go.opencensus.io/exporter/ocagent v0.4.12
-	github.com/davecgh/go-spew v1.1.1
 	github.com/docker/spdystream v0.0.0-20170912183627-bc6354cbbc29 // indirect
 	github.com/elazarl/goproxy v0.0.0-20190421051319-9d40249d3c2f // indirect
 	github.com/elazarl/goproxy/ext v0.0.0-20190711103511-473e67f1d7d2 // indirect

node/api/exec.go

@@ -109,7 +109,6 @@ func getExecOptions(req *http.Request) (*remotecommand.Options, error) {
 
 type containerExecContext struct {
 	h                         ContainerExecHandlerFunc
-	eio                       *execIO
 	namespace, pod, container string
 	ctx                       context.Context
 }

node/pod.go

@@ -16,10 +16,8 @@ package node
 
 import (
 	"context"
-	"hash/fnv"
 	"time"
 
-	"github.com/davecgh/go-spew/spew"
 	"github.com/google/go-cmp/cmp"
 	pkgerrors "github.com/pkg/errors"
 	"github.com/virtual-kubelet/virtual-kubelet/errdefs"
@@ -117,20 +115,6 @@ func podsEqual(pod1, pod2 *corev1.Pod) bool {
 
 }
 
-// This is basically the kube runtime's hash container functionality.
-// VK only operates at the Pod level so this is adapted for that
-func hashPodSpec(spec corev1.PodSpec) uint64 {
-	hash := fnv.New32a()
-	printer := spew.ConfigState{
-		Indent:         " ",
-		SortKeys:       true,
-		DisableMethods: true,
-		SpewKeys:       true,
-	}
-	printer.Fprintf(hash, "%#v", spec)
-	return uint64(hash.Sum32())
-}
-
 func (pc *PodController) handleProviderError(ctx context.Context, span trace.Span, origErr error, pod *corev1.Pod) {
 	podPhase := corev1.PodPending
 	if pod.Spec.RestartPolicy == corev1.RestartPolicyNever {