Remove __future__ dependency

MicroPython doesn't include __future__
To anyone still using Python 2.x, please switch to Python 3.x :)

Author: sfe-SparkFro

examples/qwiic_keypad_ex1.py

@@ -39,7 +39,6 @@
 # Example 1
 #
 
-from __future__ import print_function
 import qwiic_keypad
 import time
 import sys

examples/qwiic_keypad_ex2.py

@@ -39,7 +39,6 @@
 # Example 2
 #
 
-from __future__ import print_function
 import qwiic_keypad
 import time
 import sys

examples/qwiic_keypad_ex3.py

@@ -39,7 +39,6 @@
 # Example 3
 #
 
-from __future__ import print_function
 import qwiic_keypad
 import time
 import sys

qwiic_keypad.py

@@ -56,8 +56,6 @@
 
 """
 #-----------------------------------------------------------------------------
-from __future__ import print_function
-
 import qwiic_i2c
 
 # Define the device name and I2C addresses. These are set in the class defintion