chore(cloudrun): migrate region tags for dockerfiles and yaml from run folder - part 2 - step 3 (GoogleCloudPlatform#13105)

* chore(cloudrun): delete old region tags in run/pubsub/Dockerfile

* chore(cloudrun): delete old region tags in run/system_package/Dockerfile

Author: eapl-gemugami

run/pubsub/Dockerfile

@@ -13,7 +13,6 @@
 # limitations under the License.
 
 # [START cloudrun_pubsub_dockerfile_python]
-# [START cloudrun_pubsub_dockerfile]
 
 # Use the official Python image.
 # https://hub.docker.com/_/python
@@ -41,5 +40,4 @@ COPY . ./
 # Timeout is set to 0 to disable the timeouts of the workers to allow Cloud Run to handle instance scaling.
 CMD exec gunicorn --bind :$PORT --workers 1 --threads 8 --timeout 0 main:app
 
-# [END cloudrun_pubsub_dockerfile]
 # [END cloudrun_pubsub_dockerfile_python]

run/system-package/Dockerfile

@@ -20,11 +20,9 @@ FROM python:3.11
 ENV PYTHONUNBUFFERED True
 
 # [START cloudrun_system_package_ubuntu_dockerfile_python]
-# [START cloudrun_system_package_ubuntu]
 RUN apt-get update -y && apt-get install -y \
   graphviz \
   && apt-get clean
-# [END cloudrun_system_package_ubuntu]
 # [END cloudrun_system_package_ubuntu_dockerfile_python]
 
 # Copy application dependency manifests to the container image.