[clangd] Remove stale comment. NFC

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@372074 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/clangd/ClangdServer.h b/clangd/ClangdServer.h
index 83a74ff..36e4a89 100644
--- a/clangd/ClangdServer.h
+++ b/clangd/ClangdServer.h
@@ -51,8 +51,6 @@
   virtual void onFileUpdated(PathRef File, const TUStatus &Status){};
 
   /// Called by ClangdServer when some \p Highlightings for \p File are ready.
-  /// \p NumLines are the number of lines in the file where the highlightings
-  /// where generated from.
   virtual void
   onHighlightingsReady(PathRef File,
                        std::vector<HighlightingToken> Highlightings) {}