Auto merge of #11329 - c-rhodes:11320, r=jdm

Report use statements that use {} with only one entry

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.

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components/script/dom/testbinding.rs

@@ -29,7 +29,7 @@ use js::jsval::{JSVal, NullValue};
 use std::borrow::ToOwned;
 use std::ptr;
 use std::rc::Rc;
-use util::prefs::{get_pref};
+use util::prefs::get_pref;
 
 #[dom_struct]
 pub struct TestBinding {