@Test
  public void removeNonExistent() throws Exception {
    try (final KeyValueStorage store = createStore()) {
      final byte[] key = bytesFromHexString("0F");

      KeyValueStorageTransaction tx = store.startTransaction();
      tx.remove(key);
      tx.commit();
      assertThat(store.get(key)).isEmpty();
    }
  }
Remove non existent.

@throws Exception the exception
testutil/src/main/java/org/hyperledger/besu/kvstore/AbstractKeyValueStorageTest.java