Revert "Update example to demonstrate issue"

This reverts commit df1be6eaeca1f8b56ba3bd2888504862d355a14c.

examples/webgl_materials_texture_partialupdate.html

@@ -119,11 +119,10 @@
 				for ( var i = 0; i < size; i ++ ) {
 
 					var stride = i * 3;
-					var gradient = i / size;
 
-					data[ stride ] = r * gradient;
-					data[ stride + 1 ] = g * gradient;
-					data[ stride + 2 ] = b * gradient;
+					data[ stride ] = r;
+					data[ stride + 1 ] = g;
+					data[ stride + 2 ] = b;
 
 				}