manual cleanup

src/blockforest/AABBRefinementSelection.h

src/blockforest/GlobalLoadBalancing.h

src/core/ConcatIterator.h

src/core/math/Matrix2.h

src/core/math/Matrix3.h

src/core/math/Quaternion.h

src/core/math/Vector2.h

src/core/math/Vector3.h

src/core/timing/TimingTree.h

src/field/GhostLayerField.impl.h

src/lbm/field/Density.h

src/mesa_pd/collision_detection/BroadPhase.h

src/mesa_pd/kernel/ParticleSelector.h

src/pe/rigidbody/BodyIterators.h