[BUG] https://github.com/CVCUDA/CV-CUDA/blob/v0.15.0/samples/classification/Main.cpp#L90 cuda memory not free

[callinglove]

Describe the bug
A clear and concise description of the bug. cudaMalloc has no cudaFree

Steps/Code to reproduce bug
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http://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports to craft a
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Expected behavior
A clear and concise description of what you expected to happen.
add relative cudaFree

Environment overview (please complete the following information)

• Environment location: [Bare-metal, Docker, Cloud(specify cloud provider)]
• Method of cuDF install: [Docker, pip, or from source]
  • If method of install is [Docker], provide docker pull & docker run commands used

Environment details
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Additional context
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