Option to eliminate transitive production dependency on jsdoc

Hi, our security tools are complaining about jsdoc; so, I am trying to eliminate our transitive dependency on jsdoc.
```
$ npm ls --omit=dev jsdoc

└─┬ @google-cloud/secret-manager@4.2.0
└─┬ google-gax@3.5.3
└─┬ protobufjs-cli@1.1.0
└── jsdoc@4.0.0
```
I can effectively accomplish that with a postinstall script that removes jsdoc from node_modules, since our app doesn't use any of the features that require jsdoc. However, I have been asked to query about the possibility of eliminating jsdoc as a prod dependency.

Could it make sense for google-gax to provide multiple packages, including one that is jsdoc-free, so that dependent modules could have only a dev dependency on jsdoc?

Thanks.

Beginne damit, die Abhängigkeitskette mit `npm ls --omit=dev jsdoc` zu reproduzieren, und untersuche dann, wie google-gax und protobufjs-cli jsdoc paketieren. Als abgeschlossen sollte gelten, dass ein unterstützter jsdoc-freier Produktionsabhängigkeitspfad bereitgestellt wird, ohne Funktionalität zu entfernen, die jsdoc erfordert.

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