Remove valid-jsdoc rules from eslint-config-fluid

The valid-jsdoc rules were deprecated from eslint in v5.10.0. We should remove them from the eslint-config-fluid to prevent warnings or errors from those using the community config with newer versions of eslint. 

see: https://eslint.org/docs/rules/valid-jsdoc

As an alternative we can recommend using eslint-plugin-jsdoc and provide a default configuration file to mixin for it. 

see: https://eslint.org/docs/developer-guide/shareable-configs