message: Remove skip-list related descriptors from DB
diff: @@ -24,7 +24,6 @@ use shell::shell_channel::{ShellChannel, ShellChannelTopic, ShuttingDown};
  use storage::{block_storage, BlockMetaStorage, BlockStorage, ChainMetaStorage, check_database_compatibility, context_action_storage, ContextActionStorage, MempoolStorage, OperationsMetaStorage, OperationsStorage, resolve_storage_init_chain_data, StorageInitInfo, SystemStorage};
  use storage::persistent::{CommitLogSchema, KeyValueSchema, open_cl, open_kv, PersistentStorage};
  use storage::persistent::sequence::Sequences;
  -use storage::skip_list::{DatabaseBackedSkipList, Lane, ListValue};
  use tezos_api::environment;
  use tezos_api::environment::TezosEnvironmentConfiguration;
  use tezos_api::ffi::TezosRuntimeConfiguration;
  @@ -331,9 +330,6 @@ fn main() {
  context_action_storage::ContextActionByTypeIndex::descriptor(),
  ContextActionStorage::descriptor(),
  SystemStorage::descriptor(),
  - DatabaseBackedSkipList::descriptor(),
  - Lane::descriptor(),
  - ListValue::descriptor(),
  Sequences::descriptor(),
  MempoolStorage::descriptor(),
  ChainMetaStorage::descriptor(),
  