[clang] [clang][NFC][diagnostics] Remove several uses of `getCustomDiagID()` (PR #172532)

[Corentin Jabot via cfe-commits]

https://github.com/cor3ntin edited 
https://github.com/llvm/llvm-project/pull/172532
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits