[clang] [Clang][Sema] Refactor collection of multi-level template argument lists (PR #106585)

[Erich Keane via cfe-commits]

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@@ -52,38 +52,6 @@ using namespace sema;
 //===----------------------------------------------------------------------===/
 
 namespace {
-namespace TemplateInstArgsHelpers {
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erichkeane wrote:

Awe, I thought this was clever/useful :) 

https://github.com/llvm/llvm-project/pull/106585