FIX: Opaque display after completed slicing

Change-Id: I944f5063ba41b767d01a26052e23bd803425b081
(cherry picked from commit f4d5ef5814c50d8477ac21e58182b00dbb20d6c8)

src/slic3r/GUI/GCodeViewer.hpp

@@ -734,13 +734,6 @@ public:
 
     //BBS
     ConflictResultOpt m_conflict_result;
-    bool   GetGcodeGenOk()
-    {
-        if (m_roles.empty())
-            return false;
-        else
-            return true;
-    }
 private:
     std::vector<int> m_plater_extruder;
     bool m_gl_data_initialized{ false };