Remove unused SfxFrameDescriptor::SetActualURL parameter

It got technically unused when e79e8117dc
"loplugin:unusedfields in sfx2" removed SfxFrameDescriptor::aActualURL, which in
turn had apparently become unused over a series of commits cleaning up unused
code.  The function looks like a misnomer now, and it is not clear to me whether
what it does is still useful (and whether or not all the clean-up that brought
us here was actually good), but lets leave the remains as they are for now.

Change-Id: I0479068176cc72193b2b44fc49d8fd3d71eadcb5
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/106013
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

include/sfx2/frmdescr.hxx

@@ -66,7 +66,7 @@ public:
     const INetURLObject&    GetURL() const
                             { return aURL; }
     void                    SetURL( const OUString& rURL );
-    void                    SetActualURL( std::u16string_view rURL );
+    void                    SetActualURL();
 
                             // FrameName
     const OUString&         GetName() const

sfx2/source/doc/frmdescr.cxx

@@ -45,10 +45,10 @@ SfxItemSet* SfxFrameDescriptor::GetArgs()
 void SfxFrameDescriptor::SetURL( const OUString& rURL )
 {
     aURL = INetURLObject(rURL);
-    SetActualURL(aURL.GetMainURL( INetURLObject::DecodeMechanism::ToIUri ));
+    SetActualURL();
 }
 
-void SfxFrameDescriptor::SetActualURL( std::u16string_view )
+void SfxFrameDescriptor::SetActualURL()
 {
     if ( m_pArgs )
         m_pArgs->ClearItem();

sfx2/source/view/frame.cxx

@@ -308,7 +308,7 @@ void SfxFrame::UpdateDescriptor( SfxObjectShell const *pDoc )
     assert(pDoc && "NULL-Document inserted ?!");
 
     const SfxMedium *pMed = pDoc->GetMedium();
-    GetDescriptor()->SetActualURL( pMed->GetOrigURL() );
+    GetDescriptor()->SetActualURL();
 
     // Mark FileOpen parameter
     SfxItemSet* pItemSet = pMed->GetItemSet();