diff --git a/appengine/go11x/cloudsql/cloudsql.go b/appengine/go11x/cloudsql/cloudsql.go
index c88c0007b1..bf29cb8dfc 100644
--- a/appengine/go11x/cloudsql/cloudsql.go
+++ b/appengine/go11x/cloudsql/cloudsql.go
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// [START gae_cloudsql]
-
 // Sample cloudsql demonstrates connection to a Cloud SQL instance from App Engine standard.
 package main
 
@@ -119,5 +117,3 @@ func mustGetenv(k string) string {
 	}
 	return v
 }
-
-// [END gae_cloudsql]
diff --git a/appengine/go11x/helloworld/helloworld.go b/appengine/go11x/helloworld/helloworld.go
index 810fab1e11..673a218c98 100644
--- a/appengine/go11x/helloworld/helloworld.go
+++ b/appengine/go11x/helloworld/helloworld.go
@@ -12,12 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// [START gae_go111_app]
-
 // Sample helloworld is an App Engine app.
 package main
 
-// [START gae_go111_import]
 import (
 	"fmt"
 	"log"
@@ -25,16 +22,9 @@ import (
 	"os"
 )
 
-// [END gae_go111_import]
-
-// [START gae_go111_main_func]
-// [START main_func]
-
 func main() {
 	http.HandleFunc("/", indexHandler)
 
-	// [START gae_go111_setting_port]
-	// [START setting_port]
 	port := os.Getenv("PORT")
 	if port == "" {
 		port = "8080"
@@ -45,16 +35,8 @@ func main() {
 	if err := http.ListenAndServe(":"+port, nil); err != nil {
 		log.Fatal(err)
 	}
-	// [END setting_port]
-	// [END gae_go111_setting_port]
 }
 
-// [END main_func]
-// [END gae_go111_main_func]
-
-// [START gae_go111_indexHandler]
-// [START indexHandler]
-
 // indexHandler responds to requests with our greeting.
 func indexHandler(w http.ResponseWriter, r *http.Request) {
 	if r.URL.Path != "/" {
@@ -63,7 +45,3 @@ func indexHandler(w http.ResponseWriter, r *http.Request) {
 	}
 	fmt.Fprint(w, "Hello, World!")
 }
-
-// [END indexHandler]
-// [END gae_go111_indexHandler]
-// [END gae_go111_app]
diff --git a/bigtable/writes/write_aggregate.go b/bigtable/writes/write_aggregate.go
index d6bfc69bec..9453461900 100644
--- a/bigtable/writes/write_aggregate.go
+++ b/bigtable/writes/write_aggregate.go
@@ -15,7 +15,6 @@
 // Package writes contains snippets related to writing to Cloud Bigtable.
 package writes
 
-// [START bigtable_writes_aggregate]
 import (
 	"context"
 	"fmt"
@@ -55,5 +54,3 @@ func writeAggregate(w io.Writer, projectID, instanceID string, tableName string)
 	fmt.Fprintf(w, "Successfully wrote row: %s\n", rowKey)
 	return nil
 }
-
-// [END bigtable_writes_aggregate]
diff --git a/jobs/v3/howto/basic_job_sample.go b/jobs/v3/howto/basic_job_sample.go
index c1fd71a88b..db989f9643 100644
--- a/jobs/v3/howto/basic_job_sample.go
+++ b/jobs/v3/howto/basic_job_sample.go
@@ -24,8 +24,6 @@ import (
 	talent "google.golang.org/api/jobs/v3"
 )
 
-// [START job_create_job]
-
 // createJob create a job as given.
 func createJob(w io.Writer, projectID string, jobToCreate *talent.Job) (*talent.Job, error) {
 	ctx := context.Background()
@@ -51,10 +49,6 @@ func createJob(w io.Writer, projectID string, jobToCreate *talent.Job) (*talent.
 	return job, err
 }
 
-// [END job_create_job]
-
-// [START job_get_job]
-
 // getJob gets a job by name.
 func getJob(w io.Writer, jobName string) (*talent.Job, error) {
 	ctx := context.Background()
@@ -79,10 +73,6 @@ func getJob(w io.Writer, jobName string) (*talent.Job, error) {
 	return job, err
 }
 
-// [END job_get_job]
-
-// [START job_update_job]
-
 // updateJob update a job with all fields except name.
 func updateJob(w io.Writer, jobName string, jobToUpdate *talent.Job) (*talent.Job, error) {
 	ctx := context.Background()
@@ -108,10 +98,6 @@ func updateJob(w io.Writer, jobName string, jobToUpdate *talent.Job) (*talent.Jo
 	return job, err
 }
 
-// [END job_update_job]
-
-// [START job_update_job_with_field_mask]
-
 // updateJobWithMask updates a job by name with specific fields.
 // mask is a comma separated list top-level fields of talent.Job.
 func updateJobWithMask(w io.Writer, jobName string, mask string, jobToUpdate *talent.Job) (*talent.Job, error) {
@@ -139,10 +125,6 @@ func updateJobWithMask(w io.Writer, jobName string, mask string, jobToUpdate *ta
 	return job, err
 }
 
-// [END job_update_job_with_field_mask]
-
-// [START job_delete_job]
-
 // deleteJob deletes an existing job by name.
 func deleteJob(w io.Writer, jobName string) error {
 	ctx := context.Background()
@@ -164,10 +146,6 @@ func deleteJob(w io.Writer, jobName string) error {
 	return err
 }
 
-// [END job_delete_job]
-
-// [START job_list_jobs]
-
 // listJobs lists jobs with a filter, for example
 // `companyName="projects/my-project/companies/123"`.
 func listJobs(w io.Writer, projectID, filter string) (*talent.ListJobsResponse, error) {
@@ -196,5 +174,3 @@ func listJobs(w io.Writer, projectID, filter string) (*talent.ListJobsResponse,
 
 	return resp, err
 }
-
-// [END job_list_jobs]
diff --git a/kms/check_state_import_job.go b/kms/check_state_import_job.go
index cf2da17a64..408b19bad9 100644
--- a/kms/check_state_import_job.go
+++ b/kms/check_state_import_job.go
@@ -14,7 +14,6 @@
 
 package kms
 
-// [START kms_check_state_import_job]
 import (
 	"context"
 	"fmt"
@@ -46,5 +45,3 @@ func checkStateImportJob(w io.Writer, name string) error {
 	fmt.Fprintf(w, "Current state of import job %q: %s\n", result.Name, result.State)
 	return nil
 }
-
-// [END kms_check_state_import_job]
diff --git a/vision/detect/detect.go b/vision/detect/detect.go
index fc766ff788..9422a5e375 100644
--- a/vision/detect/detect.go
+++ b/vision/detect/detect.go
@@ -32,8 +32,6 @@ func init() {
 	_ = os.Open
 }
 
-// [START vision_face_detection]
-
 // detectFaces gets faces from the Vision API for an image at the given file path.
 func detectFaces(w io.Writer, file string) error {
 	ctx := context.Background()
@@ -72,8 +70,6 @@ func detectFaces(w io.Writer, file string) error {
 	return nil
 }
 
-// [END vision_face_detection]
-
 // [START vision_label_detection]
 
 // detectLabels gets labels from the Vision API for an image at the given file path.