[clang] Revert "Reland: [clang][test] add testing for the AST matcher reference" (PR #116477)

[Matheus Izvekov via cfe-commits]

mizvekov wrote:

Can you please describe the reason the patch was reverted?

It's better to put this information in the commit message.

https://github.com/llvm/llvm-project/pull/116477