Merge pull request #896 from eclipse/ab_20190910_smallfix

Fix old API use in standalone sample project

Author: AlexDBlack

standalone-sample-project/src/main/java/org/deeplearning4j/LenetMnistExample.java

@@ -94,7 +94,7 @@ public static void main(String[] args) throws Exception {
                         .activation(Activation.SOFTMAX)
                         .build())
                 .setInputType(InputType.convolutionalFlat(28,28,1)) //See note below
-                .backprop(true).pretrain(false).build();
+                .build();
 
         /*
         Regarding the .setInputType(InputType.convolutionalFlat(28,28,1)) line: This does a few things.