Remove unused imports from controllers.ludl and valuelogger.raspberrypi

Author: David Miguel Susano Pinto

microscope/controllers/ludl.py

@@ -22,7 +22,6 @@
 """Ludl controller.
 """
 
-import contextlib
 import re
 import threading
 import time

microscope/digitalio/raspberrypi.py

@@ -22,19 +22,15 @@
 """Raspberry Pi Digital IO module.
 """
 
-import contextlib
 import logging
 import queue
-import re
 import threading
 import time
-import typing
 
 import RPi.GPIO as GPIO
 
 import microscope.abc
 
-
 # Support for async digital IO control on the Raspberryy Pi.
 # Currently supports digital input and output via GPIO lines
 

microscope/valuelogger/raspberrypi.py

@@ -22,14 +22,10 @@
 """Raspberry Pi Value Logger module.
 """
 
-import contextlib
 import logging
 import queue
-import re
 import threading
 import time
-import typing
-
 
 try:
     from Adafruit_MCP9808 import MCP9808
@@ -48,7 +44,6 @@
 
 import microscope.abc
 
-
 # Support for async digital IO control on the Raspberryy Pi.
 # Currently supports digital input and output via GPIO lines