servo: Merge #11329 - Report use statements that use {} with only one entry (from c-rhodes:11320); r=jdm

Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data:
- [X ] `./mach build -d` does not report any errors
- [X ] `./mach test-tidy --faster` does not report any errors
- [X ] These changes fix #11320  (github issue number if applicable).

Either:
- [X] There are tests for these changes OR
- [ ] These changes do not require tests because _____

Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process.

Source-Repo: https://github.com/servo/servo
Source-Revision: 2f9796fa696e9514280777398467696dd4f004b3

servo/components/script/dom/plugin.rs

@@ -4,7 +4,7 @@
 
 use dom::bindings::codegen::Bindings::PluginBinding::PluginMethods;
 use dom::bindings::js::Root;
-use dom::bindings::reflector::{Reflector};
+use dom::bindings::reflector::Reflector;
 use dom::bindings::str::DOMString;
 use dom::mimetype::MimeType;