[clang] [clang][NFC] Remove class layout scissor (PR #89055)

[Fangrui Song via cfe-commits]

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@@ -950,18 +948,20 @@ void CGRecordLowering::calculateZeroInit() {
 }
 
 // Verify accumulateBitfields computed the correct storage representations.
-void CGRecordLowering::checkBitfieldClipping() const {
+void CGRecordLowering::checkBitfieldClipping(
+    bool IsNonVirtualBaseType LLVM_ATTRIBUTE_UNUSED) const {
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MaskRay wrote:

The doc of LLVM_ATTRIBUTE_UNUSED doesn't suggest variable uses.

Since we use `-Wno-unused-parameter` and `IsNonVirtualBaseType` is used in !NDEBUG code paths, we can just use `(bool IsNonVirtualBaseType)`

https://github.com/llvm/llvm-project/pull/89055