fix flake8 errors

Author: degemer

agent.py

@@ -38,7 +38,6 @@
 from emitter import http_emitter
 
 # utils
-from util import Watchdog
 from utils.cloud_metadata import EC2
 from utils.configcheck import configcheck, sd_configcheck
 from utils.flare import Flare

dogstatsd.py

@@ -43,7 +43,6 @@
 from daemon import AgentSupervisor, Daemon
 from util import chunks, get_uuid, plural
 from utils.hostname import get_hostname
-from utils.pidfile import PidFile
 from utils.net import inet_pton
 from utils.net import IPV6_V6ONLY, IPPROTO_IPV6
 from utils.pidfile import PidFile

util.py

@@ -6,7 +6,6 @@
 import logging
 import platform
 import re
-import sys
 import time
 import uuid
 

windows_supervisor.py

@@ -27,7 +27,7 @@
 from config import (
     get_config,
 )
-from util import get_hostname
+from utils.hostname import get_hostname
 from utils.jmx import JMXFiles