delete some allocated memory in EwaldCached
delete some allocated memory in EwaldCached

GOMC-WSU/GOMC_Serial,GOMC-WSU/GOMC_Serial,GOMC-WSU/GOMC,GOMC-WSU/GOMC_Serial,GOMC-WSU/GOMC,GOMC-WSU/GOMC,GOMC-WSU/GOMC,GOMC-WSU/GOMC