Simplify README examples section

Author: tekktrik

README.rst

@@ -56,62 +56,7 @@ To install in a virtual environment in your current project:
 Usage Example
 =============
 
-adafruit_max7219.Matrix8x8 Example
-----------------------------------
-
-.. code-block:: python
-
-      from adafruit_max7219 import matrices
-      from board import TX, RX, A2
-      import busio
-      import digitalio
-      import time
-
-      clk = RX
-      din = TX
-      cs = digitalio.DigitalInOut(A2)
-
-      spi = busio.SPI(clk, MOSI=din)
-      display = matrices.Matrix8x8(spi, cs)
-      while True:
-          display.brightness(3)
-
-          display.fill(1)
-          display.pixel(3, 3)
-          display.pixel(3, 4)
-          display.pixel(4, 3)
-          display.pixel(4, 4)
-          display.show()
-          time.sleep(3.0)
-
-          display.clear_all()
-          s = 'Hello, World!'
-          for c in range(len(s)*8):
-              display.fill(0)
-              display.text(s,-c,0)
-              display.show()
-              time.sleep(0.25)
-
-
-adafruit_max7219.BCDDigits Example
-----------------------------------
-
-.. code-block:: python
-
-      from adafruit_max7219 import bcddigits
-      from board import TX, RX, A2
-      import bitbangio
-      import digitalio
-
-      clk = RX
-      din = TX
-      cs = digitalio.DigitalInOut(A2)
-
-      spi = bitbangio.SPI(clk, MOSI=din)
-      display = bcddigits.BCDDigits(spi, cs, nDigits=8)
-      display.clear_all()
-      display.show_str(0,'{:9.2f}'.format(-1234.56))
-      display.show()
+See the ``examples/`` folder example uses of this library.
 
 Documentation
 =============