* Remove cell from pending launch list.
* TODO: someday: For now, this code assumes only one app launch per cell.
*/
void remove (CellID cellID, String executionCapability) {
LinkedList<LaunchRequest> reqs = getLaunches(executionCapability);
LaunchRequest reqToRemove = null;
if (reqs == null) return;
for (LaunchRequest req : reqs) {
if (req.cellID.equals(cellID)) {
reqToRemove = req;
break;