Merge pull request #21 from adafruit/dhalbert-ustruct

Remove obsolete reference to ustruct

Author: TheKitty

adafruit_mpl3115a2.py

@@ -26,15 +26,10 @@
 * Adafruit's Bus Device library: https://github.com/adafruit/Adafruit_CircuitPython_BusDevice
 
 """
+import struct
 import time
 
 from micropython import const
-
-try:
-    import ustruct as struct
-except ImportError:
-    import struct
-
 from adafruit_bus_device import i2c_device