Use same id for deleting missing files in linter
Use same id for deleting missing files in linter

Using a custom id generated by `SecureRandom.hex` breaks tests for
GridFS storage, since Mongo requires IDs to be in the BSON format. When
we upload a file, the storage automatically modifies the location with
the actual BSON id, so we can just that instead.

janko-m/shrine,janko-m/shrine