CANADA STOCKS-TSX declines as TD, CIBC slip after results

* TSX down 44.48 points, or 0.29 percent, at 15,558.17 * Six of 10 main index sectors decline * TD slips 0.8 percent, CIBC falls 2.2 percent By John Tilak TORONTO, Aug 28 (Reuters) - Canada's main stock index fell on Thursday as shares of Toronto Dominion Bank and Canadian Imperial Bank of Commerce weakened after the two lenders reported quarterly results. Bank shares had a strong run-up before their earnings and portfolio managers said that expectations may have gotten ahe