no-unnecessary-type-assertion: Minor cleanup (#2559)
no-unnecessary-type-assertion: Minor cleanup (#2559)


IllusionMH/tslint,mprobst/tslint,mprobst/tslint,berickson1/tslint,andy-ms/tslint,IllusionMH/tslint,mprobst/tslint,andy-hanson/tslint,palantir/tslint,berickson1/tslint,andy-ms/tslint,andy-ms/tslint,IllusionMH/tslint,palantir/tslint,berickson1/tslint,JoshuaKGoldberg/tslint,andy-hanson/tslint,palantir/tslint,andy-hanson/tslint,JoshuaKGoldberg/tslint,JoshuaKGoldberg/tslint