Update multiple-layers: only the first layer needs inputShape (#230)

Author: yining1023

p5js/NeuralNetwork/NeuralNetwork_multiple-layers/sketch.js

@@ -10,7 +10,6 @@ const nn_options = {
         }),
         ml5.tf.layers.dense({
             units: 16,
-            inputShape: [1],
             activation: 'sigmoid',
         }),
         ml5.tf.layers.dense({
@@ -69,4 +68,4 @@ function createTrainingData(){
 
 // function draw(){
 
-// }
+// }