docs(samples): refactor webhook samples (#270)

* streamline and clarify webhook samples

Change-Id: I80d80b42f60ac6ccc643afb7b2931916d6843813

* remove sessionInfo config

Change-Id: I1b14852ad9e238e7cdc04dbb418ed5ed0fca2992

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* hardcode parameter

Change-Id: Iea962f2ea2bf73ca86ce3ecd7852a290dd3a2fac

* clarify parameter name

Change-Id: I5c0a1c654be5133889f4838a118e5bdebe667303

* refactor configure-session-parameter-enable-agent-response sample

Change-Id: I62af853767f9097e3448f60060f739ac8bb018b2

* refactor webhook samples

Change-Id: I07f2addae8b452d89124d123e3c2be8042ee0292

* remove unnecessary samples

Change-Id: Ia936ce14eafb9d44a67a314eb282fb93b5c96319

* change form parameter test

Change-Id: Ia7aeb8117f6db4bee2111bdb5bcf6461b2700601

* change sample description

Change-Id: I842e1e0bca1eec43d5437cd37575a43b48105bed

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: aribray

packages/google-cloud-dialogflow-cx/README.md

@@ -156,8 +156,6 @@ Samples are in the [`samples/`](https://github.com/googleapis/nodejs-dialogflow-
 | Long-running-operation | [source code](https://github.com/googleapis/nodejs-dialogflow-cx/blob/main/samples/long-running-operation.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-dialogflow-cx&page=editor&open_in_editor=samples/long-running-operation.js,samples/README.md) |
 | Quickstart | [source code](https://github.com/googleapis/nodejs-dialogflow-cx/blob/main/samples/quickstart.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-dialogflow-cx&page=editor&open_in_editor=samples/quickstart.js,samples/README.md) |
 | Update-intent | [source code](https://github.com/googleapis/nodejs-dialogflow-cx/blob/main/samples/update-intent.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-dialogflow-cx&page=editor&open_in_editor=samples/update-intent.js,samples/README.md) |
-| Webhook-configure-session-parameters-enable-agent-response | [source code](https://github.com/googleapis/nodejs-dialogflow-cx/blob/main/samples/webhook-configure-session-parameters-enable-agent-response.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-dialogflow-cx&page=editor&open_in_editor=samples/webhook-configure-session-parameters-enable-agent-response.js,samples/README.md) |
-| Webhook-configure-session-parameters-trigger-transition | [source code](https://github.com/googleapis/nodejs-dialogflow-cx/blob/main/samples/webhook-configure-session-parameters-trigger-transition.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-dialogflow-cx&page=editor&open_in_editor=samples/webhook-configure-session-parameters-trigger-transition.js,samples/README.md) |
 | Webhook-configure-session-parameters | [source code](https://github.com/googleapis/nodejs-dialogflow-cx/blob/main/samples/webhook-configure-session-parameters.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-dialogflow-cx&page=editor&open_in_editor=samples/webhook-configure-session-parameters.js,samples/README.md) |
 | Webhook-validate-form-parameter | [source code](https://github.com/googleapis/nodejs-dialogflow-cx/blob/main/samples/webhook-validate-form-parameter.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-dialogflow-cx&page=editor&open_in_editor=samples/webhook-validate-form-parameter.js,samples/README.md) |
 | Webhooks | [source code](https://github.com/googleapis/nodejs-dialogflow-cx/blob/main/samples/webhooks.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-dialogflow-cx&page=editor&open_in_editor=samples/webhooks.js,samples/README.md) |

packages/google-cloud-dialogflow-cx/samples/README.md

@@ -30,8 +30,6 @@
   * [Long-running-operation](#long-running-operation)
   * [Quickstart](#quickstart)
   * [Update-intent](#update-intent)
-  * [Webhook-configure-session-parameters-enable-agent-response](#webhook-configure-session-parameters-enable-agent-response)
-  * [Webhook-configure-session-parameters-trigger-transition](#webhook-configure-session-parameters-trigger-transition)
   * [Webhook-configure-session-parameters](#webhook-configure-session-parameters)
   * [Webhook-validate-form-parameter](#webhook-validate-form-parameter)
   * [Webhooks](#webhooks)
@@ -357,40 +355,6 @@ __Usage:__
 
 
 
-### Webhook-configure-session-parameters-enable-agent-response
-
-View the [source code](https://github.com/googleapis/nodejs-dialogflow-cx/blob/main/samples/webhook-configure-session-parameters-enable-agent-response.js).
-
-[![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-dialogflow-cx&page=editor&open_in_editor=samples/webhook-configure-session-parameters-enable-agent-response.js,samples/README.md)
-
-__Usage:__
-
-
-`node samples/webhook-configure-session-parameters-enable-agent-response.js`
-
-
------
-
-
-
-
-### Webhook-configure-session-parameters-trigger-transition
-
-View the [source code](https://github.com/googleapis/nodejs-dialogflow-cx/blob/main/samples/webhook-configure-session-parameters-trigger-transition.js).
-
-[![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-dialogflow-cx&page=editor&open_in_editor=samples/webhook-configure-session-parameters-trigger-transition.js,samples/README.md)
-
-__Usage:__
-
-
-`node samples/webhook-configure-session-parameters-trigger-transition.js`
-
-
------
-
-
-
-
 ### Webhook-configure-session-parameters
 
 View the [source code](https://github.com/googleapis/nodejs-dialogflow-cx/blob/main/samples/webhook-configure-session-parameters.js).