Changed the rm commands to use a common rule. On occasion make was failing because rm didn't have the -r option when it encountered directories.
Changed the rm commands to use a common rule. On occasion make was
failing because rm didn't have the -r option when it encountered
directories.

imitrichev/cantera,imitrichev/cantera,Heathckliff/cantera,Heathckliff/cantera,imitrichev/cantera,Heathckliff/cantera,Heathckliff/cantera,Heathckliff/cantera,imitrichev/cantera,imitrichev/cantera,imitrichev/cantera,Heathckliff/cantera