remove optimization crash. This case didn't make sense

theano/sandbox/cuda/opt.py

@@ -300,7 +300,7 @@ def local_gpu_elemwise_1(node):
 
 
 @register_opt()
-@local_optimizer([tensor.Split, gpu_from_host])
+@local_optimizer([tensor.Split])
 def local_gpu_split(node):
     if isinstance(node.op, tensor.Split):
         input = node.inputs[0]
@@ -308,13 +308,6 @@ def local_gpu_split(node):
             new_op = GpuSplit(node.op.len_splits)
             split_res = new_op(gpu_from_host(input), *node.inputs[1:])
             return [host_from_gpu(o) for o in split_res]
-    if isinstance(node.op, GpuFromHost):
-        host_input = node.inputs[0]
-        if host_input.owner and isinstance(host_input.owner.op, tensor.Split):
-            split_node = host_input.owner
-            new_op = GpuSplit(split_node.op.len_splits)
-            return new_op(gpu_from_host(split_node.inputs[0]),
-                          *split_node.inputs[1:])
     return False