[dper] supress excessive msg (#48404)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48404
On bento this is printing a lot of msgs like (see N408483 if you're an internal user)
```
W1123 120952.322 schema.py:811] Scalar should be considered immutable. Only call Scalar.set() on newly created Scalar with unsafe=True. This will become an error soon.
```
And it's ignoring the log level I set at global level. Removing this line unless this is super important.
Test Plan: build a local dper package and verify
Differential Revision: D25163808
fbshipit-source-id: 338d01c82b4e67269328bbeafc088987c4cbac75
