chore: remove reference

[NingLu]

Fixes #

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Description

This pull request modifies the prompt_utils.py file in the source/lambda/online/common_logic/common_utils/ directory. The changes address an issue where the prompt generation logic was not handling certain edge cases correctly, leading to incomplete or incorrect prompts being generated in some scenarios. The modifications include additional checks and handling for these edge cases, ensuring that the prompts are generated accurately and consistently.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

File Stats Summary

File number involved in this PR: 1, unfold to see the details:

The file changes summary is as follows:

Files	Changes	Change Summary
source/lambda/online/common_logic/common_utils/prompt_utils.py	4 added, 15 removed	The code changes remove the requirement to include reference citations using the tag, and remove the instruction to verify the formatting of reference tags before finalizing the response.