Mark the remove functions as test helper. functions. (#251)

# Describe Request

Mark the remove functions as test helper. functions.

# Change Type

Code maintenance.

helper/remove.go

@@ -11,6 +11,8 @@ import (
 
 // Remove removes the file with the given name.
 func Remove(t *testing.T, name string) {
+	t.Helper()
+
 	err := os.Remove(name)
 	if err != nil {
 		t.Errorf("Error removing file: %v", err)
@@ -19,6 +21,8 @@ func Remove(t *testing.T, name string) {
 
 // RemoveAll removes the files with the given path.
 func RemoveAll(t *testing.T, path string) {
+	t.Helper()
+
 	err := os.RemoveAll(path)
 	if err != nil {
 		t.Errorf("Error removing files: %v", err)