test: replace defer cleanup with t.Cleanup

Reference: https://pkg.go.dev/testing#T.Cleanup
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>

cmdtest/cmdtest_test.go

@@ -111,13 +111,6 @@ func createTestEnvironment(t *testing.T) {
 var testFolder string
 var testConfig string
 
-// removeTestEnvironment removes the test environment created by createTestEnvironment
-func removeTestEnvironment(t *testing.T) {
-	// Remove temporary folder with all contents
-	err := os.RemoveAll(testFolder)
-	require.NoError(t, err)
-}
-
 // createTestFile creates the file testFolder/name
 func createTestFile(name string, t *testing.T) string {
 	err := os.WriteFile(testFolder+"/"+name, []byte("content_of_"+name), 0666)
@@ -146,19 +139,18 @@ func createSimpleTestData(t *testing.T) string {
 	createTestFolder("testdata/folderB", t)
 	createTestFile("testdata/folderB/fileB1.txt", t)
 	createTestFile("testdata/folderB/fileB2.txt", t)
-	return testFolder + "/testdata"
-}
 
-// removeSimpleTestData removes the test data created by createSimpleTestData
-func removeSimpleTestData(t *testing.T) {
-	err := os.RemoveAll(testFolder + "/testdata")
-	require.NoError(t, err)
+	t.Cleanup(func() {
+		err := os.RemoveAll(testFolder + "/testdata")
+		require.NoError(t, err)
+	})
+
+	return testFolder + "/testdata"
 }
 
 // TestCmdTest demonstrates and verifies the test functions for end-to-end testing of rclone
 func TestCmdTest(t *testing.T) {
 	createTestEnvironment(t)
-	defer removeTestEnvironment(t)
 
 	// Test simple call and output from rclone
 	out, err := rclone("version")
@@ -213,7 +205,6 @@ func TestCmdTest(t *testing.T) {
 
 	// Test creation of simple test data
 	createSimpleTestData(t)
-	defer removeSimpleTestData(t)
 
 	// Test access to config file and simple test data
 	out, err = rclone("lsl", "myLocal:"+testFolder)