Remove unused imports introduced in #3239. (#3252)

Partly due to interaction with #3191.

substrate/Cargo.lock

@@ -2252,7 +2252,6 @@ dependencies = [
  "srml-contracts 2.0.0",
  "srml-finality-tracker 2.0.0",
  "srml-indices 2.0.0",
- "srml-support 2.0.0",
  "srml-system 2.0.0",
  "srml-timestamp 2.0.0",
  "structopt 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",

substrate/node/cli/Cargo.toml

@@ -42,7 +42,6 @@ finality_tracker = { package = "srml-finality-tracker", path = "../../srml/final
 contracts = { package = "srml-contracts", path = "../../srml/contracts" }
 system = { package = "srml-system", path = "../../srml/system" }
 balances = { package = "srml-balances", path = "../../srml/balances" }
-support = { package = "srml-support", path = "../../srml/support", default-features = false }
 
 [dev-dependencies]
 babe = { package = "substrate-consensus-babe", path = "../../core/consensus/babe", features = ["test-helpers"] }

substrate/node/cli/src/factory_impl.rs

@@ -23,13 +23,11 @@ use rand::rngs::StdRng;
 
 use parity_codec::Decode;
 use keyring::sr25519::Keyring;
-use node_primitives::Hash;
 use node_runtime::{Call, CheckedExtrinsic, UncheckedExtrinsic, SignedExtra, BalancesCall, ExistentialDeposit};
 use primitives::{sr25519, crypto::Pair};
 use parity_codec::Encode;
 use sr_primitives::{generic::Era, traits::{Block as BlockT, Header as HeaderT, SignedExtension}};
 use substrate_service::ServiceFactory;
-use support::traits::Get;
 use transaction_factory::RuntimeAdapter;
 use transaction_factory::modes::Mode;
 use crate::service;