Removing unused imports

plugins/RemovableDriveOutputDevice/RemovableDriveOutputDevice.py

@@ -8,7 +8,6 @@ from UM.Mesh.MeshWriter import MeshWriter
 from UM.Scene.Iterator.BreadthFirstIterator import BreadthFirstIterator
 from UM.OutputDevice.OutputDevice import OutputDevice
 from UM.OutputDevice import OutputDeviceError
-from UM.Preferences import Preferences
 
 from UM.i18n import i18nCatalog
 catalog = i18nCatalog("cura")

plugins/RemovableDriveOutputDevice/RemovableDrivePlugin.py

@@ -4,7 +4,6 @@
 import threading
 import time
 
-from UM.Signal import Signal
 from UM.Message import Message
 from UM.OutputDevice.OutputDevicePlugin import OutputDevicePlugin