[llvm] [llvm] Use "= default" (NFC) (PR #166088)

[David Spickett via llvm-commits]

DavidSpickett wrote:

I had to remove (https://github.com/llvm/llvm-project/commit/a3c4fe2ce7446b2439acf7fb1ca6ad5f2fb229d3) one of these changes.

I don't know if that code should have been accepted but clang 21.1.1 did not allow it. If you got that from an automatic checker and it is not correct, see if you need to file a bug with that tool.

https://github.com/llvm/llvm-project/pull/166088