Remove go.mod and go.sum

Remove ioutil.ReadFile in favor of os.ReadFile.
Remove MkdirAll in favor of Mkdir.

depot/containerstore/service_binding_root_handler.go

@@ -33,7 +33,7 @@ func NewServiceBindingRootHandler(
 
 func (h *ServiceBindingRootHandler) CreateDir(logger lager.Logger, container executor.Container) ([]garden.BindMount, error) {
 	containerDir := filepath.Join(h.bindingRootPath, container.Guid)
-	err := os.MkdirAll(containerDir, 0755)
+	err := os.Mkdir(containerDir, 0755)
 	if err != nil {
 		return nil, err
 	}
@@ -82,7 +82,7 @@ func (h *ServiceBindingRootHandler) createBindingRootsForServices(
 
 		dirName = filepath.Join(containerDir, dirName)
 
-		err := os.MkdirAll(dirName, 0755)
+		err := os.Mkdir(dirName, 0755)
 		if err != nil {
 			logger.Error("failed-to-create-directory", err, lager.Data{"dirName": dirName})
 			return fmt.Errorf("failed to create directory %s: %w", dirName, err)

depot/containerstore/service_binding_root_handler_test.go

@@ -1,7 +1,6 @@
 package containerstore_test
 
 import (
-	"io/ioutil"
 	"os"
 	"path/filepath"
 
@@ -74,7 +73,7 @@ var _ = Describe("Service Binding Root Handler", func() {
 			usernameFilePath := filepath.Join(tmpdir, fakeContainerUUID, "redis", "username")
 			Expect(usernameFilePath).To(BeAnExistingFile())
 
-			content, err := ioutil.ReadFile(usernameFilePath)
+			content, err := os.ReadFile(usernameFilePath)
 			Expect(err).NotTo(HaveOccurred())
 			Expect(string(content)).To(Equal("username"))
 		})