WHDH-TV, NBC's Boston affiliate that had indicated that it intended to dump Jay Leno's upcoming nightly variety show and run local news instead, may be having second thoughts after the network threatened to yank the station's affiliation and buy its own station in Boston. The Boston Globe observed today (Monday) that the station has removed all references to the planned 10 00 p.m. newscast from its website and that officials of the station are refusing to discuss the matter. For its part, NBC president John Eck said in a statement to Boston viewers over the weekend Jay Leno fans will not be disappointed. ... Make no mistake The new Leno show will air at [10 00 p.m.] on weeknights in the Boston market on NBC.