## Description
Without this change, there were intermittent failures due to a non-empty t.TempDir() directory at the end of a test:
```console
$ go test -run=LoadChunk$ ./snapshots/ -count=220 -failfast
--- FAIL: TestManager_LoadChunk (0.01s)
testing.go:1225: TempDir RemoveAll cleanup: unlinkat /var/folders/.../T/TestManager_LoadChunk1472891739/001: directory not empty
FAIL
FAIL cosmossdk.io/store/snapshots 0.177s
```
With this change, I can no longer reproduce the flaky failure:
```console
$ go test -run=LoadChunk$ ./snapshots/ -count=1000 -failfast
ok cosmossdk.io/store/snapshots 15.722s
```
---
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