Revert "add the python script for generate code for numerical comparison"

This reverts commit 707e9d4a6caee0f46a4d079fc44024b9c3689642.
Revert "add the corresponding Matlab used for generating the result for the unit test"

This reverts commit 07d0f98ef5eeff8083bf722fe4aa7b0af75933bb.
Revert "add corresponding Matlab fot the unit test"

This reverts commit 803a979ab6ea38a31141aa59a8c2845cbedfc5af.
Revert "add the corresponding Matlab code"

This reverts commit a0f25022aea6fe741564118cce959d78ee3fbe21.
Revert "change the private data member in  LaplacianInferenceMethod"

This reverts commit 1fa15175c10b53a5e4066035e139fd8358d70343.
Revert "we need to set the private data members in LaplacianInferenceMethod to be protected"

This reverts commit 854ff67296eead1ca6bd5200b5ff1d1e3c488092.
change the private data member to protected member in order to implement LaplacianInferenceMethodWithLBFGS