Removed the "zero landmarks, same cameras" ceres test
Removed the "zero landmarks, same cameras" ceres test

This is an unfair test that just happens to work for the VXL solver.
The test provides very poor initialization to an optimization problem
that is known to have many local minima and needs good initialization
to find the correct solution.

linus-sherrill/maptk,linus-sherrill/maptk,linus-sherrill/maptk,linus-sherrill/maptk,linus-sherrill/maptk