Remove fontawesome loading from CDN

[timelsass]

From WPTRT response to submission of theme containing BGTFW, FontAwesome should not be loaded from a CDN in the Kirki library:

"I clicked on Customize from the front end and my browser status bar said 'Read use.fontawesome.com'. This appears to be in three kirki classes. That is not allowed in themes."

This really should be updated to use the locally provided FontAwesome in the framework anyways.