[clang] [llvm] [clang][DependencyScanner] Remove unused -ivfsoverlay files (PR #73734)

[Juergen Ributzka via cfe-commits]

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@@ -54,7 +54,10 @@ enum class ScanningOptimizations {
   /// Remove warnings from system modules.
   SystemWarnings = 2,
 
-  LLVM_MARK_AS_BITMASK_ENUM(SystemWarnings),
+  /// Remove unused -ivfsoverlay arguments.
+  VFS = 4,
+
+  LLVM_MARK_AS_BITMASK_ENUM(VFS),
   All = HeaderSearch | SystemWarnings,
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ributzka wrote:

Shouldn't `VFS` be added to `All`?

https://github.com/llvm/llvm-project/pull/73734