Function stripFixedAttributes

stripFixedAttributes(): RuleConfig
RichTextSanitizer keeps an attribute with a valid fixed value. If such an attribute should be removed before storing, then this rule can be used.

Returns RuleConfig
Example: For an attribute with valid fixed value
```
<a href="" xlink:type="simple">
```
- Defined in packages/ckeditor5-coremedia-richtext/src/rules/FixedAttributes.ts:24