remove unused imports

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | 
| License       | MIT
| Doc PR        | 

Oh, you're right. I missed that. What is the usual practice for this? Do we keep the use statement or should I modify the docblock to use the fully qualified class name?