Revert "Bug2605: Save-as should not cause original to repoen with warnings..."

This reverts commit 742134caaa.

src/ProjectFileIO.cpp

@@ -2123,11 +2123,7 @@ bool ProjectFileIO::SaveProject(
 
       // Try to compact the original project file
       auto empty = TrackList::Create(&mProject);
-      Compact( { lastSaved ? lastSaved : empty.get() },
-         // Bug 2605: force compaction of the original when saving-as,
-         // so that the original does not reopen with orphan blocks,
-         // causing warning dialogs about improper save
-         true );
+      Compact( { lastSaved ? lastSaved : empty.get() } );
 
       // Save to close the original project file now
       CloseProject();