post-processor/docker-save: remove unused test functions (#8447)

post-processor/docker-save/post-processor_test.go

@@ -1,32 +1,11 @@
 package dockersave
 
 import (
-	"bytes"
 	"testing"
 
 	"github.com/hashicorp/packer/packer"
 )
 
-func testConfig() map[string]interface{} {
-	return map[string]interface{}{}
-}
-
-func testPP(t *testing.T) *PostProcessor {
-	var p PostProcessor
-	if err := p.Configure(testConfig()); err != nil {
-		t.Fatalf("err: %s", err)
-	}
-
-	return &p
-}
-
-func testUi() *packer.BasicUi {
-	return &packer.BasicUi{
-		Reader: new(bytes.Buffer),
-		Writer: new(bytes.Buffer),
-	}
-}
-
 func TestPostProcessor_ImplementsPostProcessor(t *testing.T) {
 	var _ packer.PostProcessor = new(PostProcessor)
 }