forgot to free memory.

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@7369 b45a01b8-16f6-495d-af2f-9b41ad6348cc
Fixed mismatched free/delete; removed one dangerous and unused function; added missing memory release calls

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@7370 b45a01b8-16f6-495d-af2f-9b41ad6348cc