Fix polylines being skipped in DXF blocks

pcbnew/import_gfx/dxf_import_plugin.cpp

@@ -368,9 +368,6 @@ void DXF_IMPORT_PLUGIN::addLine( const DL_LineData& aData )
 
 void DXF_IMPORT_PLUGIN::addPolyline(const DL_PolylineData& aData )
 {
-    if( m_currentBlock != nullptr )
-        return;
-
     // Convert DXF Polylines into a series of KiCad Lines and Arcs.
     // A Polyline (as opposed to a LWPolyline) may be a 3D line or
     // even a 3D Mesh. The only type of Polyline which is guaranteed

pcbnew/import_gfx/dxf_import_plugin.h

@@ -163,8 +163,6 @@ public:
     bool m_bold;
     bool m_italic;
 
-    GRAPHICS_IMPORTER_BUFFER m_buffer;
-
     DXF_IMPORT_STYLE( wxString aName, double aTextHeight, double aWidthFactor, bool aBold, bool aItalic )
     {
         m_name = aName;