minor dbutil tidy up

This patch removes a couple of minor, incorrect references to dbutil within comments.

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | 
| Refs tickets  | | License       | MIT
| Doc PR        |