Bank of America is pulling the plug on ATMs at gas stations owned by Valero Energy Corp. The reduction of its automated teller network is part of the bank's efforts to reach $8 billion in expense cuts. Bank of America's total number of ATMs fell by 1,536 in the first half of this year, leaving it with 16,220 as of June 30. The company also will not renew its lease deals at Simon Property Group Inc. sites. Simon Property is one of the largest shopping mall owners in the United States.