[clang] [Clang][Diagnose] New feature: Nested/Indented diagnostic message in sarif mode. (PR #174106)

[via cfe-commits]

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@@ -851,10 +851,6 @@ def err_drv_invalid_empty_dxil_validator_version : Error<
   "invalid validator version : %0; if validator major version is 0, minor "
   "version must also be 0">;
 
-def warn_drv_sarif_format_unstable : Warning<
-  "diagnostic formatting in SARIF mode is currently unstable">,
-  InGroup<DiagGroup<"sarif-format-unstable">>;
-
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Sirraide wrote:

Determining whether SARIF diagnostics are no longer unstable seems out of scope for this pr, especially considering that `SARIFDiagnostic.cpp` currently still has some functions that are stubbed out as `assert(false && "Not implemented in SARIF mode")`.

https://github.com/llvm/llvm-project/pull/174106