Removes two unimplemented class functions.

General clean up to the Ceres codebase to remove the functions
Evaluator::Evaluate and ProblemImpl::InternalEvaluate as they are unimplemented.

Change-Id: I77fcb2c5f43aeca69555e953d6472b6c4cd1b778

internal/ceres/evaluator.h

diff --git a/internal/ceres/evaluator.h b/internal/ceres/evaluator.h
index fea3079..68e8ca1 100644
--- a/internal/ceres/evaluator.h
+++ b/internal/ceres/evaluator.h
@@ -74,31 +74,6 @@
                            Program* program,
                            std::string* error);
 
-  // This is used for computing the cost, residual and Jacobian for
-  // returning to the user. For actually solving the optimization
-  // problem, the optimization algorithm uses the ProgramEvaluator
-  // objects directly.
-  //
-  // The residual, gradients and jacobian pointers can be NULL, in
-  // which case they will not be evaluated. cost cannot be NULL.
-  //
-  // The parallelism of the evaluator is controlled by num_threads; it
-  // should be at least 1.
-  //
-  // Note: That this function does not take a parameter vector as
-  // input. The parameter blocks are evaluated on the values contained
-  // in the arrays pointed to by their user_state pointers.
-  //
-  // Also worth noting is that this function mutates program by
-  // calling Program::SetParameterOffsetsAndIndex() on it so that an
-  // evaluator object can be constructed.
-  static bool Evaluate(Program* program,
-                       int num_threads,
-                       double* cost,
-                       std::vector<double>* residuals,
-                       std::vector<double>* gradient,
-                       CRSMatrix* jacobian);
-
   // Build and return a sparse matrix for storing and working with the Jacobian
   // of the objective function. The jacobian has dimensions
   // NumEffectiveParameters() by NumParameters(), and is typically extremely
@@ -117,7 +92,6 @@
   // Schur complement based methods.
   virtual SparseMatrix* CreateJacobian() const = 0;
 
-
   // Options struct to control Evaluator::Evaluate;
   struct EvaluateOptions {
     EvaluateOptions()

internal/ceres/problem_impl.h

diff --git a/internal/ceres/problem_impl.h b/internal/ceres/problem_impl.h
index b7f258c..67d6f11 100644
--- a/internal/ceres/problem_impl.h
+++ b/internal/ceres/problem_impl.h
@@ -185,12 +185,6 @@
   ParameterBlock* InternalAddParameterBlock(double* values, int size);
   void InternalRemoveResidualBlock(ResidualBlock* residual_block);
 
-  bool InternalEvaluate(Program* program,
-                        double* cost,
-                        std::vector<double>* residuals,
-                        std::vector<double>* gradient,
-                        CRSMatrix* jacobian);
-
   // Delete the arguments in question. These differ from the Remove* functions
   // in that they do not clean up references to the block to delete; they
   // merely delete them.