tdf#90341 Clean up excessive const_cast'ing

RequestApplyChanges()'s call sites do not require its constness.

Change-Id: Iaf9108375db7503fe1a3bd8275e13dbdddf95ab5
Reviewed-on: https://gerrit.libreoffice.org/21068Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>

starmath/inc/format.hxx

@@ -147,9 +147,9 @@ public:
     bool            operator == (const SmFormat &rFormat) const;
     inline bool     operator != (const SmFormat &rFormat) const;
 
-    void RequestApplyChanges() const
+    void RequestApplyChanges()
     {
-        const_cast<SmFormat *>(this)->Broadcast(SfxSimpleHint(HINT_FORMATCHANGED));
+        Broadcast(SfxSimpleHint(HINT_FORMATCHANGED));
     }
 
 };