Created by: zhiqiu

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OPs

Describe

Remove inplace argument when calling fluid.layers.reshape()

There are 2 reasons,

1. fluid.layers.reshape() do not support inplace in dygraph mode, while dygraph will be default in Paddle-2.0. So we need to avoid annoying warnings in Paddle-2.0 as follows.

2. fluid.layers.reshape(inplace=True) will be replace by BufferSharedIdentityInplaceOpPass, see details in #25900