[ADT] Remove an obsolete forward declaration (NFC) (#156391)

kazutakahirata · web-flow · commit 6f35a6a088e1 · 2025-09-01T23:11:59.000-07:00
We just removed CastInfoPointerUnionImpl in: commit 2d216a9 Author: Kazu Hirata <kazu@google.com> Date: Mon Sep 1 08:04:49 2025 -0700 This patch removes the obsolete forward declaration.
diff --git a/llvm/include/llvm/ADT/PointerUnion.h b/llvm/include/llvm/ADT/PointerUnion.h
@@ -88,9 +88,6 @@ namespace pointer_union_detail {
   };
 }
 
-// This is a forward declaration of CastInfoPointerUnionImpl
-// Refer to its definition below for further details
-template <typename... PTs> struct CastInfoPointerUnionImpl;
 /// A discriminated union of two or more pointer types, with the discriminator
 /// in the low bit of the pointer.
 ///

Original file line number	Diff line number	Diff line change
`@@ -88,9 +88,6 @@ namespace pointer_union_detail {`
`88`	`88`	`};`
`89`	`89`	`}`
`90`	`90`
`91`		`-// This is a forward declaration of CastInfoPointerUnionImpl`
`92`		`-// Refer to its definition below for further details`
`93`		`-template <typename... PTs> struct CastInfoPointerUnionImpl;`
`94`	`91`	`/// A discriminated union of two or more pointer types, with the discriminator`
`95`	`92`	`/// in the low bit of the pointer.`
`96`	`93`	`///`