[clang] [C++20] Deleting destructors can be noexcept (PR #118687)

[Richard Smith via cfe-commits]

================
@@ -1206,15 +1206,16 @@ CanThrowResult Sema::canThrow(const Stmt *S) {
       CT = CT_Dependent;
     } else {
       const FunctionDecl *OperatorDelete = DE->getOperatorDelete();
-      CT = canCalleeThrow(*this, DE, OperatorDelete);
-      if (const RecordType *RT = DTy->getAs<RecordType>()) {
-        const CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl());
-        const CXXDestructorDecl *DD = RD->getDestructor();
-        if (DD && !OperatorDelete->isDestroyingOperatorDelete())
+      if (!OperatorDelete->isDestroyingOperatorDelete()) {
+        CT = canCalleeThrow(*this, DE, OperatorDelete);
----------------
zygoloid wrote:

```suggestion
      CT = canCalleeThrow(*this, DE, OperatorDelete);
      if (!OperatorDelete->isDestroyingOperatorDelete()) {
```
A destroying operator delete itself can still throw, I think.

https://github.com/llvm/llvm-project/pull/118687
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