[clang] [clang-tools-extra] Suppress pedantic diagnostic for a file not ending in EOL (PR #131794)

[Richard Smith via cfe-commits]

================
@@ -627,8 +627,6 @@ buildPreamble(PathRef FileName, CompilerInvocation CI,
       return DiagnosticsEngine::Ignored;
     switch (Info.getID()) {
     case diag::warn_no_newline_eof:
-    case diag::warn_cxx98_compat_no_newline_eof:
-    case diag::ext_no_newline_eof:
       // If the preamble doesn't span the whole file, drop the no newline at
       // eof warnings.
----------------
zygoloid wrote:

```suggestion
      // eof warning.
```

https://github.com/llvm/llvm-project/pull/131794