servo: Merge #16979 - remove unused style::restyle_hints::RestyleReplacements (from manfredbrandl:patch-1); r=emilio

<!-- Please describe your changes on the following line: -->
remove unused style::restyle_hints::RestyleReplacements from line 134

---
<!-- 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` does not report any errors
- [X] These changes fix #16978 (github issue number if applicable).

<!-- Either: -->
- [X] These changes do not require tests because removes only unused "use"

<!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.-->

<!-- 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: e8f9ab51cacf75d5d92c2b87a9c23eea5bd0aed3

servo/components/script/dom/document.rs

@@ -131,7 +131,7 @@ use std::rc::Rc;
 use std::time::{Duration, Instant};
 use style::attr::AttrValue;
 use style::context::{QuirksMode, ReflowGoal};
-use style::restyle_hints::{RestyleHint, RestyleReplacements, RESTYLE_STYLE_ATTRIBUTE};
+use style::restyle_hints::{RestyleHint, RESTYLE_STYLE_ATTRIBUTE};
 use style::selector_parser::{RestyleDamage, Snapshot};
 use style::shared_lock::SharedRwLock as StyleSharedRwLock;
 use style::str::{HTML_SPACE_CHARACTERS, split_html_space_chars, str_join};