Removes unused import math from examples

Author: lamenezes

examples/char_lcd.py

@@ -1,6 +1,5 @@
 #!/usr/bin/python
 # Example using a character LCD connected to a Raspberry Pi or BeagleBone Black.
-import math
 import time
 
 import Adafruit_CharLCD as LCD

examples/char_lcd_mcp.py

@@ -1,6 +1,5 @@
 #!/usr/bin/python
 # Example using an RGB character LCD connected to an MCP23017 GPIO extender.
-import math
 import time
 
 import Adafruit_CharLCD as LCD

examples/char_lcd_plate.py

@@ -1,6 +1,5 @@
 #!/usr/bin/python
 # Example using a character LCD plate.
-import math
 import time
 
 import Adafruit_CharLCD as LCD

examples/char_lcd_rgb.py

@@ -1,6 +1,5 @@
 #!/usr/bin/python
 # Example using an RGB character LCD wired directly to Raspberry Pi or BeagleBone Black.
-import math
 import time
 
 import Adafruit_CharLCD as LCD