Revert "Bug 1034856 - Follow-up to fix small SECItem leak in PublicKeyToSpki() r=bustage"

This reverts commit d04506b4bc281a93cf46459bab83d5aae29d4c7a.
Bug 1034856 - Follow-up to fix small SECItem leak in PublicKeyToSpki() r=bustage
Bug 1034856 - Follow-up to fix small SECItem leak in PublicKeyToSpki() r=bustage