[clang-tools-extra] [include-cleaner] don't consider the associated header unused (PR #67228)

[Vadim D. via cfe-commits]

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@@ -227,6 +230,7 @@ class PragmaIncludes::RecordPragma : public PPCallbacks, public CommentHandler {
       IncludedHeader = *File;
     checkForExport(HashFID, HashLine, std::move(IncludedHeader), File);
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vvd170501 wrote:

`std::move` should be removed, because `IncludedHeader` is now also used for `checkForDeducedAssociated`.

Current implementation of `clang::include_cleaner::Header` is trivially movable, so `IncludedHeader` is unchanged, but it's safer to not rely on this fact.

https://github.com/llvm/llvm-project/pull/67228