py: phantomjs: service: remove unused import of signal

Signed-off-by: AutomatedTester <dburns@mozilla.com>

Author: blueyed

py/selenium/webdriver/phantomjs/service.py

@@ -15,13 +15,13 @@
 # specific language governing permissions and limitations
 # under the License.
 import platform
-import signal
 import subprocess
 import time
 
 from selenium.common.exceptions import WebDriverException
 from selenium.webdriver.common import utils
 
+
 class Service(object):
  """
  Object that manages the starting and stopping of PhantomJS / Ghostdriver