docs: update eventarc docs (GoogleCloudPlatform#5560)

## Description

Removes documentation for the product, Eventarc, that is now on CloudSite.

- Removes outdated Anthos links / docs
- Removes Docker instructions in this GitHub file
- Tested locally

Author: grant

eventarc/README.md

@@ -1,40 +1,20 @@
-# Google Cloud Eventarc Python Samples
+# Eventarc Python Samples
 
-[![Open in Cloud Shell][shell_img]][shell_link]
-
-[shell_img]: http://gstatic.com/cloudssh/images/open-btn.png
-[shell_link]: https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/GoogleCloudPlatform/python-docs-samples&page=editor&open_in_editor=blog/README.md
-
-This directory contains samples for Google Cloud Eventarc.
+This directory contains python samples for Eventarc.
 
 ## Samples
 
-|           Sample                |        Description       |     Deploy    |
-| ------------------------------- | ------------------------ | ------------- |
-|[Events – Pub/Sub][events_pubsub]  | Event-driven service with Events for Cloud Run for Pub/Sub    |      -        |
-|[Anthos Events – Pub/Sub][anthos_events_pubsub]  | Event-driven service with Events for Cloud Run on Anthos for Pub/Sub  |      -        |
-|[Events – GCS][events_storage]  | Event-driven service with Events for Cloud Run for GCS    |      -        |
-|[Anthos Events – GCS][anthos_events_storage]  | Event-driven service with Events for Cloud Run on Anthos for GCS  |      -        |
-
-For more Cloud Run samples beyond Python, see the main list in the [Cloud Run Samples repository](https://github.com/GoogleCloudPlatform/cloud-run-samples).
+- [Pub/Sub][events_pubsub]
+- [Audit Logs – Cloud Storage][events_audit_storage]
+- [Generic][events_generic]
 
 ## Setup
 
 1. [Set up for Cloud Run development](https://cloud.google.com/run/docs/setup)
 
-2. Clone this repository:
-
-    ```
-    git clone https://github.com/GoogleCloudPlatform/python-docs-samples.git
-    ```
+1. Install [`pip`][pip] and [`virtualenv`][virtualenv] if you do not already have them.
 
-    Note: Some samples in the list above are hosted in other repositories. They are noted with the symbol "➥".
-
-## How to run a sample locally
-
-Install [`pip`][pip] and [`virtualenv`][virtualenv] if you do not already have them.
-
-You may want to refer to the [`Python Development Environment Setup Guide`][setup] for Google Cloud Platform for instructions.   
+    - You may want to refer to the [`Python Development Environment Setup Guide`][setup] for Google Cloud Platform for instructions.   
 
 1. Create a virtualenv. Samples are compatible with Python 2.7 and 3.4+.
 
@@ -55,87 +35,9 @@ You may want to refer to the [`Python Development Environment Setup Guide`][setu
     python main.py
     ```
 
-## How to run a sample in a container
-
-1. [Install docker locally](https://docs.docker.com/install/)
-
-2. [Build the sample container](https://cloud.google.com/run/docs/building/containers#building_locally_and_pushing_using_docker):
-
-    ```
-    export SAMPLE=<SAMPLE_NAME>
-    cd $SAMPLE
-    docker build --tag $SAMPLE .
-    ```
-
-3. [Run containers locally](https://cloud.google.com/run/docs/testing/local)
-
-    With the built container:
-
-    ```
-    PORT=8080 && docker run --rm -p 8080:${PORT} -e PORT=${PORT} $SAMPLE
-    ```
-
-    Overriding the built container with local code:
-
-    ```
-    PORT=8080 && docker run --rm \
-        -p 8080:${PORT} -e PORT=${PORT} \
-        -v $PWD:/app $SAMPLE
-    ```
-
-    Injecting your service account key for access to GCP services:
-
-    ```
-    # Set the name of the service account key within the container
-    export SA_KEY_NAME=my-key-name-123
-
-    PORT=8080 && docker run --rm \
-        -p 8080:${PORT} \
-        -e PORT=${PORT} \
-        -e GOOGLE_APPLICATION_CREDENTIALS=/tmp/keys/${SA_KEY_NAME}.json \
-        -v $GOOGLE_APPLICATION_CREDENTIALS:/tmp/keys/${SA_KEY_NAME}.json:ro \
-        -v $PWD:/app $SAMPLE
-    ```
-
-    * Use the --volume (-v) flag to inject the credential file into the container
-      (assumes you have already set your `GOOGLE_APPLICATION_CREDENTIALS`
-      environment variable on your machine)
-
-    * Use the --environment (-e) flag to set the `GOOGLE_APPLICATION_CREDENTIALS`
-      variable inside the container
-
-    Learn more about [testing your container image locally.][testing]
-
-## Deploying a Cloud Run service
-
-1. Set an environment variable with your GCP Project ID
-    ```
-    export GOOGLE_CLOUD_PROJECT=<PROJECT_ID>
-    ```
-
-1. Submit a build using Google Cloud Build
-    ```
-    gcloud builds submit --tag gcr.io/${GOOGLE_CLOUD_PROJECT}/${SAMPLE}
-    ```
-
-1. Deploy to Cloud Run
-    ```
-    gcloud run deploy $SAMPLE --image gcr.io/${GOOGLE_CLOUD_PROJECT}/${SAMPLE}
-    ```
-
-Choose a particular sample for information about triggering the service with an event.
-
-See [Building containers][run_build] and [Deploying container images][run_deploy]
-for more information.
-
-[run_docs]: https://cloud.google.com/run/docs/
-[run_build]: https://cloud.google.com/run/docs/building/containers
-[run_deploy]: https://cloud.google.com/run/docs/deploying
-[events_pubsub]: pubsub/README.md
-[anthos_events_pubsub]: pubsub/anthos.md
-[events_storage]: audit-storage/README.md
-[anthos_events_storage]: audit-storage/anthos.md
-[testing]: https://cloud.google.com/run/docs/testing/local#running_locally_using_docker_with_access_to_services
+[events_pubsub]: pubsub/
+[events_audit_storage]: audit-storage/
+[events_generic]: generic/
 [setup]: https://cloud.google.com/python/setup
 [pip]: https://pip.pypa.io/
 [virtualenv]: https://virtualenv.pypa.io/