docs: remove fields filter warning

Author: jannyHou

docs/site/Fields-filter.md

@@ -27,11 +27,8 @@ query will include **only** those you specifically include with filters.
 
 ### REST API
 
-{% include warning.html content="
-As a known bug, the option `<false>` does not work for url for now. Please include the properties you need or use the [stringified JSON format](Querying-data.html#using-stringified-json-in-rest-queries) to meet your requirement. The bug is tracked in the GH issue [#4992](https://github.com/strongloop/loopback-next/issues/4992)" %}
-
 <pre>
-filter[fields][<i>propertyName</i>]=true&filter[fields][<i>propertyName</i>]=true...
+filter[fields][<i>propertyName</i>]=true|false&filter[fields][<i>propertyName</i>]=true|false...
 </pre>
 
 Note that to include more than one field in REST, use multiple filters.
@@ -50,14 +47,18 @@ Return customer information only with `name` and `address`, and hide their `id`:
 await customerRepository.find({fields: {id: false, name: true, address: true}});
 ```
 
+Or use stringified JSON format:
+
+`/orders?filter={"fields":{"name":true,"address":true,"id":false}}`
+
 {% include code-caption.html content="REST" %}
 
-Include all required properties as a workaround:
+Include all required properties:
 `/customers?filter[fields][name]=true&filter[fields][address]=true`
 
-Or use stringified JSON format:
+Or omit the hidden property:
 
-`/orders?filter={"fields":{"name":true,"address":true,"id":false}}`
+`/customers?filter[fields][id]=false`
 
 Returns: