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

[Jan Svoboda via cfe-commits]

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@@ -576,6 +576,12 @@ class HeaderSearch {
   /// Note: implicit module maps don't contribute to entry usage.
   std::vector<bool> computeUserEntryUsage() const;
 
+  /// Determine which HeaderSearchOptions::VFSOverlayFiles have been
+  /// successfully used so far and mark their index with 'true' in the resulting
+  /// bit vector.
+  /// Note: implicit module maps don't contribute to entry usage.
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jansvoboda11 wrote:

This might be a leftover from the previous approach.

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