Fix fluid.data code example, test=develop, test=document_preview (#1472)

* fix fluid.data code example, test=develop, test=document_preview

doc/fluid/api_cn/layers_cn/deformable_roi_pooling_cn.rst

@@ -45,19 +45,17 @@ deformable_roi_pooling
     #position_sensitive为False
 
     import paddle.fluid as fluid
-    input = fluid.layers.data(name="input",
+    input = fluid.data(name="input",
                        shape=[2, 192, 64, 64],
-                              dtype='float32',
-                              append_batch_size=False)
-    rois = fluid.layers.data(name="rois",
-                             shape=[4],
+                       dtype='float32')
+    rois = fluid.data(name="rois",
+                      shape=[-1, 4],
                       dtype='float32',
                       lod_level=1)
-    trans = fluid.layers.data(name="trans",
+    trans = fluid.data(name="trans",
                        shape=[2, 384, 64, 64],
-                              dtype='float32',
-                              append_batch_size=False)
-    x = fluid.layers.nn.deformable_roi_pooling(input=input,
+                       dtype='float32')
+    x = fluid.layers.deformable_roi_pooling(input=input,
                                             rois=rois,
                                             trans=trans,
                                             no_trans=False,
@@ -73,19 +71,17 @@ deformable_roi_pooling
     #position_sensitive为True
 
     import paddle.fluid as fluid
-    input = fluid.layers.data(name="input",
+    input = fluid.data(name="input",
                        shape=[2, 192, 64, 64],
-                              dtype='float32',
-                              append_batch_size=False)
-    rois = fluid.layers.data(name="rois",
-                             shape=[4],
+                       dtype='float32')
+    rois = fluid.data(name="rois",
+                      shape=[-1, 4],
                       dtype='float32',
                       lod_level=1)
-    trans = fluid.layers.data(name="trans",
+    trans = fluid.data(name="trans",
                        shape=[2, 384, 64, 64],
-                              dtype='float32',
-                              append_batch_size=False)
-    x = fluid.layers.nn.deformable_roi_pooling(input=input,
+                       dtype='float32')
+    x = fluid.layers.deformable_roi_pooling(input=input,
                                             rois=rois,
                                             trans=trans,
                                             no_trans=False,