Remove calls to remove() in destructors, which were commented

src/constraint_base.cpp

@@ -81,7 +81,6 @@ ConstraintBase::ConstraintBase(ConstraintType _tp, LandmarkBasePtr _landmark_ptr
 
 ConstraintBase::~ConstraintBase()
 {
-//    remove();
     std::cout << "destructed       -c" << id() << std::endl;
 }
 

src/frame_imu.cpp

@@ -37,7 +37,6 @@ FrameIMU::FrameIMU(const FrameKeyType& _tp, const TimeStamp& _ts, const Eigen::V
 
   FrameIMU::~FrameIMU()
   {
-//      remove();
       if (acc_bias_ptr_ != nullptr)
       {
           if (getProblem() != nullptr && type_id_ == KEY_FRAME)

src/landmark_base.cpp

@@ -24,7 +24,6 @@ LandmarkBase::LandmarkBase(const LandmarkType & _tp, const std::string& _type, S
                 
 LandmarkBase::~LandmarkBase()
 {
-//    remove();
     std::cout << "destructed   -L" << id() << std::endl;
 
     // Remove State Blocks

src/processor_base.cpp

@@ -20,7 +20,6 @@ ProcessorBase::ProcessorBase(ProcessorType _tp, const std::string& _type, const
 
 ProcessorBase::~ProcessorBase()
 {
-//    remove();
     std::cout << "destructed     -p" << id() << std::endl;
 }