[clang] [CIR] Upstream ComplexType builtin_complex (PR #144225)

[Andy Kaylor via cfe-commits]

================
@@ -96,6 +96,7 @@ class RValue {
     er.isVolatile = false;
     return er;
   }
+
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andykaylor wrote:

Not needed in this PR

https://github.com/llvm/llvm-project/pull/144225