fix: remove llama-index-legacy dependency in llama-index-core

[Digma]

Description

Follow-up on discussion in #16974. Thanks @masci

Removing the mention to llama-index-legacy which has side effects like requiring tenacity<0.9.0

Let me know if there is anything else to change.

I assume the corresponding lock files are generated automatically on merge Seems like test are failing so pushed the updated poetry.lock

Fixes # (issue)

Type of Change

Please delete options that are not relevant.

• 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

How Has This Been Tested?

Your pull-request will likely not be merged unless it is covered by some form of impactful unit testing.

• I added new unit tests to cover this change
• I believe this change is already covered by existing unit tests

Suggested Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added Google Colab support for the newly added notebooks.
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I ran make format; make lint to appease the lint gods

[logan-markewich]

@Digma any way you can give me push permissions to this branch/repo? I'd like to update the docs pages the mention or use llama-index-legacy

[Digma]

@logan-markewich Thanks for having a look. I added you to the repo. Let me know if the permission are sufficient.