clean the code

source/sample/transformer/T2TEncoder.cpp

@@ -117,10 +117,6 @@ XTensor AttEncoder::Make(XTensor &input, XTensor &mask, bool skipInputRes)
             x = attLayerNorms[i].Make(att); 
         }
         else{
-            //if(i == 1)
-            //    x.Dump(tf, "x:");
-            //if(i == 1)
-            //    llnum = 1;
 
             /* self attention */
             att = attentions[i].Make(x, x, x, mask);