Blow Away Meaning

(transitive, computing, informal) To delete (data, files, etc.).

Example: Used other than as an idiom: see blow,‎ away.
  He blew away the dust which had collected on the book.
2012 October 31, David M. Halbfinger, "[1]," New York Times (retrieved 31 October 2012):
  Perhaps as startling as the sheer toll was the devastation to some of the state’s well-known locales. Boardwalks along the beach in Seaside Heights, Belmar and other towns on the Jersey Shore were blown away. Amusement parks, arcades and restaurants all but vanished. Bridges to barrier islands buckled, preventing residents from even inspecting the damage to their property.
  I didn't have to rake. The leaves just blew away.
  The kid just blew the clerk away.
  The critics were blown away by their latest album.
2011 February 5, Paul Fletcher, “Newcastle 4 - 4 Arsenal”[2], BBC:
  Newcastle were completely blown away during the opening half of the match but worked up a head of steam after the interval that saw them score four goals in 19 minutes against a bruised and beleaguered Arsenal.
2011 October 23, Tom Fordyce, “2011 Rugby World Cup final: New Zealand 8-7 France”[3], BBC Sport:
  And when skipper Richie McCaw hoisted the Webb Ellis Trophy high into the night, a quarter of a century of hurt was blown away in an explosion of fireworks and cheering.