Unnecessary ClearKeyKeySet import in index.d.ts

[howardpanton]

There is a ClearKeyKeySet import at the top of the type file.
https://github.com/Dash-Industry-Forum/dash.js/blob/development/index.d.ts#L1
`
import ClearKeyKeySet from "./src/streaming/protection/vo/ClearKeyKeySet";

export = dashjs;
export as namespace dashjs;
This import is unused and causes a typescript build error when using dash.js with Angular.
[ts]
Could not find a declaration file for module './src/streaming/protection/vo/ClearKeyKeySet'. '/Users/howardpanton/Sites/m2a-dashboard-beta/node_modules/dashjs/src/streaming/protection/vo/ClearKeyKeySet.js' implicitly has an 'any' type.
`

[nicosang]

Hi @howardpanton ,

thanks for pointing this out but this issue has been fixed in PR Remove import from typings file #2792.
It will be available in the next 2.9.2 release.

Nico