Remove unused (and leaked) CDiscAdjFEAIteration::fem_iteration.

Author: jblueh

SU2_CFD/include/iteration/CDiscAdjFEAIteration.hpp

@@ -40,7 +40,6 @@ class CFEAIteration;
  */
 class CDiscAdjFEAIteration final : public CIteration {
  private:
-  CFEAIteration* fem_iteration;    /*!< \brief Pointer to the primal iteration class. */
   unsigned short CurrentRecording; /*!< \brief Stores the current status of the recording. */
 
   /*!

SU2_CFD/src/iteration/CDiscAdjFEAIteration.cpp

@@ -30,11 +30,9 @@
 #include "../../include/solvers/CFEASolver.hpp"
 #include "../../include/output/COutput.hpp"
 
-CDiscAdjFEAIteration::CDiscAdjFEAIteration(const CConfig *config) : CIteration(config), CurrentRecording(NONE) {
-  fem_iteration = new CFEAIteration(config);
-}
+CDiscAdjFEAIteration::CDiscAdjFEAIteration(const CConfig *config) : CIteration(config), CurrentRecording(NONE) {}
 
-CDiscAdjFEAIteration::~CDiscAdjFEAIteration() = default;
+CDiscAdjFEAIteration::~CDiscAdjFEAIteration() {};
 
 void CDiscAdjFEAIteration::Preprocess(COutput* output, CIntegration**** integration, CGeometry**** geometry,
                                       CSolver***** solver, CNumerics****** numerics, CConfig** config,