protokube: Remove unused ExecuteTemplate function

This eliminates some unused code.

protokube/pkg/protokube/BUILD.bazel

@@ -18,7 +18,6 @@ go_library(
         "kube_context.go",
         "kube_dns.go",
         "labeler.go",
-        "models.go",
         "openstack_volume.go",
         "rbac.go",
         "tainter.go",

protokube/pkg/protokube/models.go

@@ -1,43 +0,0 @@
-/*
-Copyright 2019 The Kubernetes Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package protokube
-
-import (
-	"bytes"
-	"fmt"
-	"text/template"
-)
-
-// ExecuteTemplate renders the specified template with the model
-func ExecuteTemplate(key string, templateDefinition string, model interface{}) ([]byte, error) {
-	t := template.New(key)
-
-	_, err := t.Parse(templateDefinition)
-	if err != nil {
-		return nil, fmt.Errorf("error parsing template %q: %v", key, err)
-	}
-
-	t.Option("missingkey=zero")
-
-	var buffer bytes.Buffer
-	err = t.ExecuteTemplate(&buffer, key, model)
-	if err != nil {
-		return nil, fmt.Errorf("error executing template %q: %v", key, err)
-	}
-
-	return buffer.Bytes(), nil
-}