Channel 21, Channel 50 cut newscastsCONCORD. (AP) — A situation comedy has replaced a Derry television station’s 6 p.m newscast and Channel 21 in Concord has temporarily eliminated news entirely.Channel 50 in Derry has dropped its 6 p.m, newscast in exchange for a series of five-minute news and weather breaks during the evening, newsdirector Clint Bond said Wednesday. The news breaks will begin Monday Bond said the station fired fourpeople in making the change last month He said the 10 p.m newscastwas not affected.Bond said the station felt it wassplitting its audience between the 6 p.m. and 10 p.m. shows and decidedto put more emphasis on the later newscast The 10 p.m. program is repeated at 12:30 a.m.Sam Magaletta. operations controller for Channel 21. said the stationI#will go back Into the news business” after It hires a new general managerto develop a format, T.J. Flatley Co. of Braintree, Mass., bought the station last month and fired the general• lmanager and five others.Magaletta said no news has beenbroadcast since Dec. 20. He did notknow when the station would beginbroadcasting news again.Dividend declaredThe Board of Directors of W.RGrace Co. declared a quarterlycash dividend of 70 cents per share onits common stock, payable March 10 to shareholders of record Feb. 1.Grace also declared dividends forthe year 1985 of $H per share on pre