call : remove train arg from doc string
diff --git a/keras/engine/topology.py b/keras/engine/topology.py
index a6d3d08aa68..aa74db292c9 100644
--- a/keras/engine/topology.py
+++ b/keras/engine/topology.py
@@ -409,8 +409,6 @@ def call(self, x, mask=None):
 
         # Arguments
             x: input tensor, or list/tuple of input tensors.
-            train: boolean, whether the layer should behave
-                in train behavior (e.g. dropout on) or test behavior.
             mask: a masking tensor (or list of tensors). Used mainly in RNNs.
 
         # Returns:
