The ornamental design for a demolitiontool, as shown and described.
FIG. 1 is a perspective illustration, from the front and left side, of a demolition tool according to our design;
FIG. 2 is a side elevational view thereof from the left side;
FIG. 3 is a side elevational view thereof from the right side;
FIG. 4 is a bottom plan view thereof; and,
FIG. 5 is a back elevational view thereof.
The broken line showing of portions and features is included for the purpose of illustrating unclaimed subject matter and forms no part of the claimed design.