[clang] [Clang] Remove unnecessary Decl transform & profiles for SizeOfPackExpr (PR #124533)

[via cfe-commits]

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@@ -720,6 +720,34 @@ template <typename... Ts> struct d {
 template struct c<int>;
 template struct d<int, int>;
 
+namespace Regression_123441 {
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cor3ntin wrote:

```suggestion
namespace GH123441 {
```

https://github.com/llvm/llvm-project/pull/124533