The government on Tuesday dropped one charge against Pfc. Bradley Manning, the confessed source of vast archives of government documents made public through WikiLeaks, as pretrial hearings wrapped up. The trial begins June 3. The judge said prosecutors had decided not to pursue the charge that Private Manning, 25, had leaked a classified State Department cable in February 2010 knowing it could harm the United States. A military legal spokesman said prosecutors told the court Tuesday that they had accepted Private Manning’s plea to the lesser offense of leaking the cable. A conviction would have added eight years to his sentence. In February, Private Manning confessed to providing about 700,000 documents to WikiLeaks, pleading guilty to several charges carrying a penalty of up to 20 years in prison in a bid for leniency. But prosecutors decided to pursue more serious charges, which could result in life without parole.