In Texas, are all SFH liens removed after a sheriff's sale?

In Texas, are all SFH liens removed after a [county] sheriff’s sale? If not, which ones are removed and which ones stay?

There’s no state income tax, so most investors look for federal tax liens.

Article on tax sale due diligence http://www.reiclub.com/articles/tax-sales-tax-certificates

Here’s more info on tax sales in Texas. http://www.traviscountytax.org/goPropertiesForeclosures.do