https://phabricator.services.mozilla.com/D209108
https://github.com/mozilla/gecko-dev/commit/33cdc6655b0de44cb7a431216dcbb0d5a552aec6

clang 19 will report error if w/o this patch:

  src/third_party/mozjs/extract/js/src/threading/ExclusiveData.h:113:29: error: reference to non-static member function must be called

diff --git a/src/third_party/mozjs/extract/js/src/threading/ExclusiveData.h b/src/third_party/mozjs/extract/js/src/threading/ExclusiveData.h
index c43cd1797ca..c401797fafd 100644
--- a/src/third_party/mozjs/extract/js/src/threading/ExclusiveData.h
+++ b/src/third_party/mozjs/extract/js/src/threading/ExclusiveData.h
@@ -109,11 +109,6 @@ class ExclusiveData {
   explicit ExclusiveData(const MutexId& id, Args&&... args)
       : lock_(id), value_(std::forward<Args>(args)...) {}
 
-  ExclusiveData(ExclusiveData&& rhs)
-      : lock_(std::move(rhs.lock)), value_(std::move(rhs.value_)) {
-    MOZ_ASSERT(&rhs != this, "self-move disallowed!");
-  }
-
   ExclusiveData& operator=(ExclusiveData&& rhs) {
     this->~ExclusiveData();
     new (mozilla::KnownNotNull, this) ExclusiveData(std::move(rhs));