Combine a pointlessly split class implementation and bin unused private field

Change-Id: I44cee32e256e0767bb3b40bdba93e15b717c9ba6

include/xmloff/shapeexport.hxx

@@ -162,7 +162,6 @@ private:
     UniReference< XMLPropertyHandlerFactory >   mxSdPropHdlFactory;
     UniReference< SvXMLExportPropertyMapper >   mxPropertySetMapper;
     UniReference< XMLAnimationsExporter >       mxAnimationsExporter;
-    sal_Int32                                   mnNextUniqueShapeId;
     ShapesInfos                                 maShapesInfos;
     ShapesInfos::iterator                       maCurrentShapesIter;
     sal_Bool                                    mbExportLayer;

xmloff/Library_xo.mk

@@ -138,9 +138,6 @@ $(eval $(call gb_Library_add_exception_objects,xo,\
     xmloff/source/draw/sdxmlexp \
     xmloff/source/draw/sdxmlimp \
     xmloff/source/draw/shapeexport \
-    xmloff/source/draw/shapeexport2 \
-    xmloff/source/draw/shapeexport3 \
-    xmloff/source/draw/shapeexport4 \
     xmloff/source/draw/shapeimport \
     xmloff/source/draw/xexptran \
     xmloff/source/draw/ximp3dobject \