Drop unused "reserve" fields

Probably a relic from the past, when people tried to avoid changing public
headers incompatibly to avoid causing recompilations for their
colleagues... We are long past such concerns. The talk about "extensions" in
the comment is most likely obsolete.

Change-Id: If90ca02685bf82ed529becb715b4c614287fdc57

include/svx/svddrag.hxx

@@ -53,26 +53,9 @@ protected:
     Point     aRealLast; // RealPos of the last Point (for MinMoved)
     Rectangle aActionRect;
 
-    // Backup for compatible extensions which otherwise would become incompatible
-    Point     aReservePoint1;
-    Point     aReservePoint2;
-    Point     aReservePoint3;
-    Point     aReservePoint4;
-    Rectangle aReserveRect1;
-    Rectangle aReserveRect2;
     bool      bEndDragChangesAttributes;
     bool      bEndDragChangesGeoAndAttributes;
     bool      bMouseIsUp;
-    bool      aReserveBool3;
-    bool      aReserveBool4;
-    long      aReserveLong1;
-    long      aReserveLong2;
-    long      aReserveLong3;
-    long      aReserveLong4;
-    void*     aReservePtr1;
-    void*     aReservePtr2;
-    void*     aReservePtr3;
-    void*     aReservePtr4;
 
     bool      bShown;    // Xor visible?
     sal_uInt16    nMinMov;   // So much has to be minimally moved first