Removed unnecessary destructor definition.
Removed unnecessary destructor definition.

pfi/pficommon,retrieva/pficommon,pfi/pficommon,takei-yuya/pficommon,takei-yuya/pficommon,retrieva/pficommon,retrieva/pficommon,takei-yuya/pficommon,retrieva/pficommon,pfi/pficommon,takei-yuya/pficommon,retrieva/pficommon,pfi/pficommon