Drain it and you should be fine. Its really only in the liquid to preserve the chicken and keep it moist; so losing the fluid should help some.
Although the canned chicken I sometimes get is dry and almosty inedible, even with fluid in the can.
A box of Tuna Helper, a box Mint Milano cookies and a quart of half and half......3400 calories
few eating challenges, thousands of calories.......... :-)