Revert "fdo#43869 use the old rtf importer for paste"

This reverts commit bb147bbb. It's no
longer needed, now the new importer supports importing to an existing
document.

sw/source/filter/rtf/swparrtf.cxx

@@ -26,7 +26,6 @@
 #include <tools/helpers.hxx>
 #include <svl/itemiter.hxx>
 #include <svtools/rtftoken.h>
-#include <svtools/miscopt.hxx>
 #include <svl/intitem.hxx>
 #include <editeng/fhgtitem.hxx>
 #include <editeng/ulspitem.hxx>
@@ -223,11 +222,6 @@ sal_uLong SwRTFReader::Read( SwDoc &rDoc, const String& /*rBaseURL*/, SwPaM& rPa
 
 extern "C" SAL_DLLPUBLIC_EXPORT Reader* SAL_CALL ImportRTF()
 {
-    // Use the old rtf importer by default for paste, till the new one supports
-    // undo stack and PaM.
-    SvtMiscOptions aMiscOptions;
-    if (!aMiscOptions.IsExperimentalMode())
-        return new RtfReader();
     return new SwRTFReader();
 }