docs: remove stale sample (#390)

This PR was generated using Autosynth. 🌈


<details><summary>Log from Synthtool</summary>

```
{synth_log}
```
</details>

packages/google-cloud-language/README.md

@@ -93,7 +93,6 @@ has instructions for running the samples.
 | Sample                      | Source Code                       | Try it |
 | --------------------------- | --------------------------------- | ------ |
 | Analyze v1 | [source code](https://github.com/googleapis/nodejs-language/blob/master/samples/analyze.v1.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-language&page=editor&open_in_editor=samples/analyze.v1.js,samples/README.md) |
-| Analyze v1beta2 | [source code](https://github.com/googleapis/nodejs-language/blob/master/samples/analyze.v1beta2.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-language&page=editor&open_in_editor=samples/analyze.v1beta2.js,samples/README.md) |
 | Automl Natural Language Dataset | [source code](https://github.com/googleapis/nodejs-language/blob/master/samples/automlNaturalLanguageDataset.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-language&page=editor&open_in_editor=samples/automlNaturalLanguageDataset.js,samples/README.md) |
 | Automl Natural Language Model | [source code](https://github.com/googleapis/nodejs-language/blob/master/samples/automlNaturalLanguageModel.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-language&page=editor&open_in_editor=samples/automlNaturalLanguageModel.js,samples/README.md) |
 | Automl Natural Language Predict | [source code](https://github.com/googleapis/nodejs-language/blob/master/samples/automlNaturalLanguagePredict.js) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/nodejs-language&page=editor&open_in_editor=samples/automlNaturalLanguagePredict.js,samples/README.md) |

packages/google-cloud-language/synth.metadata

@@ -1,13 +1,13 @@
 {
-  "updateTime": "2020-03-05T23:10:39.769777Z",
+  "updateTime": "2020-03-12T11:29:13.125922Z",
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