Time to break out the desoldering kit. Relevant Wikihow with solder wick or solder sucker: http://www.wikihow.com/Remove-Solder
PSA: DO NOT fire up your Bitfury without looking over *all* of your solder connections.
You can usually fix these by running the tip of a clean soldering iron between the bridged pins. Some of the excess solder will stick to the iron. Clean it off and repeat until the bridge is gone. If that doesn't fix it, then it's time to move on to solder wick...
Apply some rosin flux and heat with a fine tip solder, the bridge should break immediately.