Remove requirement that voxel dimensions be multiples of 32

[schornakj]

Yak PR 34 removed the assertion that the dimensions of the voxel volume be multiples of 32 after it was determined that the underlying CUDA code handled uneven voxel dimensions correctly.

The lines that check for this can be removed:
https://github.com/ros-industrial/yak_ros/blob/6aa7a39c19d930cbdeea55833ed74a45fa287bb4/yak_ros/src/yak_ros1_node.cpp#L322-L326