remove unnecessay path join in setup.py

[shihabuddinbuet]

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

NONE

[feast-ci-bot]

Hi @shihabuddinbuet. Thanks for your PR.

I'm waiting for a feast-dev member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[jklegar]

/kind housekeeping

[jklegar]

/ok-to-test

[jklegar]

Thanks @shihabuddinbuet!

[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jklegar, shihabuddinbuet

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[jklegar]

/lgtm