Remove unused color mode options

Removed unused color mode options from the select dropdown.

Author: xcontcom

cnn/index.html

@@ -24,11 +24,7 @@
 	<label>Color mode
 		<select id="colorMode">
 			<option value="grayscale">Grayscale</option>
-			<option value="hsl">HSL</option>
-			<option value="binary">Black/White (mod 2)</option>
 			<option value="mod4" selected>Black/White (mod 4: 01 / 23)</option>
-			<option value="rgb">RGB</option>
-			<option value="livingstone">Livingstone</option>
 			<option value="alleycat">Alley Cat</option>
 		</select>
 	</label>