Outdated OPT example

[lelandfy]

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🐛 Describe the bug

When running OPT example, I got the following errors:

AttributeError: type object 'ChunkManager' has no attribute 'search_chunk_size'

This is caused by an outdated API. Comparing to the OPT example in ColossalAI, the example here is not updated up for a while.

Environment

No response