editeng: remove bogus copy ctor

default copy ctor and assignment is deleted because AttribsType
(vector<unique_ptr<T>>) can't be copied

Change-Id: Ifb95298591c3f0ed5eb04a119efeb065a3eb8705
Reviewed-on: https://gerrit.libreoffice.org/40330Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

editeng/source/editeng/editdoc.hxx

@@ -192,8 +192,6 @@ private:
     SvxFont         aDefFont;          // faster than ever from the pool!
     bool            bHasEmptyAttribs;
 
-                    CharAttribList( const CharAttribList& ) {}
-
 public:
                     CharAttribList();
                     ~CharAttribList();