Do the Dead Sea Scrolls render the King James Bible obsolete?
No, they support it.
The Dead Sea Scrolls which were found by an Arab shepherd boy in 1947 in the Qumran caves near Jericho, Israel have no ill effect on the Bible.
Their text actually agrees with the King James Bible. This fact makes them unattractive to scholars desiring to overthrow the perfect Bible. So, other than commenting on the irony of the way in which they were found, they are largely ignored.
The translators of the King James Bible did not need the Dead Sea Scrolls since they already had the Textus Receptus which they match.