The ornamental design for a removablecover for a knot of a tie, as shown and described.
FIG. 1 is a perspective view of the removable cover for a knot of a tie showing our new design;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a front view thereof; and,
FIG. 7 is a perspective view of the removable cover for a knot of a tie shown in an example environment.
The portions of the shirt outlined by broken lines in the view of FIG. 7 illustrates the environment of the claimed design and forms no part of the claimed design.