Remove problem formulation

Zit te bedenken wat ik erin zou moeten zetten maar volgens mij staat het al redelijk goed in de inleiding.

Ik weet niet hoe ik het mathematischer kan neerzetten zonder dat de background al uitgelegd is.

Eigenlijk is dit al de problem formulation, volgens mij:

> This paper presents a new domain involving Unmanned Aerial Vehicles (UAVs)
cooperating to deliver data packages from one UAV to the base station. To match
this problem with an appropriate planner, this paper presents an overview of
other interesting domains and probabilistic planners that were involved in the
redefinition of an interesting planning problem. By evaluating the domains with
the help of the probabilistic interestingness baseline test introduced by Little et
al. [4] a recommendation will be made for a suitable planner to match the UAV
problem.