fix: expired data still exists in disk

[codecov[bot]]

Codecov Report

Base: 80.26% // Head: 80.28% // Increases project coverage by +0.01% :tada:

Coverage data is based on head (70972f4) compared to base (68edeb2). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #97 +/- ## ========================================== + Coverage 80.26% 80.28% +0.01% ========================================== Files 17 17 Lines 993 994 +1 ========================================== + Hits 797 798 +1 Misses 144 144 Partials 52 52 ``` | Flag | Coverage Δ | | |---|---|---| | unittests | `80.28% <100.00%> (+0.01%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=xyctruth#carryforward-flags-in-the-pull-request-comment) to find out more. | [Impacted Files](https://codecov.io/gh/xyctruth/profiler/pull/97?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=xyctruth) | Coverage Δ | | |---|---|---| | [pkg/storage/badger/store.go](https://codecov.io/gh/xyctruth/profiler/pull/97/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=xyctruth#diff-cGtnL3N0b3JhZ2UvYmFkZ2VyL3N0b3JlLmdv) | `73.91% <100.00%> (+0.09%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=xyctruth). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=xyctruth)

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