Remove unused imports. Explicitly import a few deep imports.

lib/daemon.py

@@ -24,7 +24,6 @@
 # SOFTWARE.
 import ast
 import os
-import sys
 import time
 
 # from jsonrpc import JSONRPCResponseManager
@@ -34,12 +33,11 @@ from jsonrpclib.SimpleJSONRPCServer import SimpleJSONRPCServer, SimpleJSONRPCReq
 from .version import ELECTRUM_VERSION
 from .network import Network
 from .util import json_decode, DaemonThread
-from .util import print_msg, print_error, print_stderr, UserCancelled
+from .util import print_error
 from .wallet import Wallet
 from .storage import WalletStorage
 from .commands import known_commands, Commands
 from .simple_config import SimpleConfig
-from .plugins import run_hook
 from .exchange_rate import FxThread