[clang] [clang] Remove written template args from implicit var tpl spec (PR #156329)

[Andrey Ali Khan Bolshakov via cfe-commits]

bolshakov-a wrote:

I always forget about release notes, thanks! However, there isn't "Potential AST breaking changes" section but there is "AST Dumping Potentially Breaking Changes" one. But this PR doesn't change AST dumps. Maybe, "C++ Specific Potentially Breaking Changes"?

https://github.com/llvm/llvm-project/pull/156329