public LmdbEnv build() {
            return new LmdbEnv(
                    lmdbEnvDir,
                    maxStoreSize,
                    maxDbs,
                    maxReaders,
                    envFlags,
                    errorHandler);
        }
Deletes {@link stroom.lmdb.LmdbEnv} from the filesystem if it is already closed.
stroom-lmdb/src/main/java/stroom/lmdb2/LmdbEnv.java