tdf#143320 Crash at paste/undo paste again

revert
    commit 790135003b03b38a14efb7e0d345188607020a99
    Author: Noel Grandin <noel.grandin@collabora.co.uk>
    Date:   Wed May 19 20:03:07 2021 +0200
    fix leak when removing PageDesc

Change-Id: Ia6a03dec2db8f68c5c0c34d6ee9fb1889151f29d
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/118885
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
diff --git a/sw/source/core/doc/docdesc.cxx b/sw/source/core/doc/docdesc.cxx
index c51c5cd..a4de727 100644
--- a/sw/source/core/doc/docdesc.cxx
+++ b/sw/source/core/doc/docdesc.cxx
@@ -753,7 +753,6 @@ void SwDoc::DelPageDesc( size_t i, bool bBroadcast )
    PreDelPageDesc(&rDel); // #i7983#

    m_PageDescs.erase(m_PageDescs.begin() + i);
    delete &rDel;
    getIDocumentState().SetModified();
}