Remove some unnecessary codes in classification.cpp

[GarryLau]

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Issue summary

In the file: "caffe\examples\cpp_classification\classification.cpp" there are some unnecessary codes.
Codes between L151 and L155 are unnecessary:

  Blob<float>* input_layer = net_->input_blobs()[0];
  input_layer->Reshape(1, num_channels_,
                       input_geometry_.height, input_geometry_.width);
  /* Forward dimension change to all layers. */
  net_->Reshape();

Steps to reproduce

Comment the codes will be OK, you can also get the right results.

Tried solutions

Comment the codes between L151 and L155.

System configuration

Actually, it does not matter with System configuration.

• Operating system: Ubuntu 16.04
• Compiler: GCC\G++
• CUDA version (if applicable): 9.0
• CUDNN version (if applicable): 7.0
• BLAS: OpenBlas
• Python version (if using pycaffe): 2.7
• MATLAB version (if using matcaffe): no

Issue checklist

• read the guidelines and removed the first paragraph
• written a short summary and detailed steps to reproduce
• explained how solutions to related problems failed (tick if found none)
• filled system configuration
• attached relevant logs/config files (tick if not applicable)

[Noiredd]

Thank you for your interest. Please note that this is but a simple example, mostly for educational purposes rather than high-performance inference. Maybe those lines could be removed, or maybe they would be but only in your case - I don't know that off the top of my head. But I think they should stay, if only as a good practice example (you should check whether the image you want to classify fits in your network).

I will close this issue for now. If you feel like this deserves more attention - please open a PR and start a discussion there.