linux: do not reimport re in get_systemd_service_active()

re is already imported at the top.
The docstring is not detected if some import occurs before. This is now
also fixed.

Signed-off-by: Bastian Krause <[email protected]>

Author: Bastian-Krause

labgridhelper/linux.py

@@ -142,7 +142,6 @@ def get_systemd_service_active(command, service):
     return exitcode == 0
 
 def get_interface_ip(command, interface="eth0"):
-    import re
     """Returns the global valid IPv4 address of the supplied interface
 
     Args: