using LRU cache is actually slower, so removing it
using LRU cache is actually slower, so removing it

--HG--
branch : DubinsStateSpace

utiasASRL/batch-informed-trees,utiasASRL/batch-informed-trees,sonny-tarbouriech/ompl,jvgomez/ompl,sonny-tarbouriech/ompl,florianhauer/ompl,florianhauer/ompl,utiasASRL/batch-informed-trees,davetcoleman/ompl,utiasASRL/batch-informed-trees,jvgomez/ompl,davetcoleman/ompl,jvgomez/ompl,florianhauer/ompl,sonny-tarbouriech/ompl,jvgomez/ompl,davetcoleman/ompl,florianhauer/ompl,davetcoleman/ompl,florianhauer/ompl,davetcoleman/ompl,sonny-tarbouriech/ompl,sonny-tarbouriech/ompl,davetcoleman/ompl,utiasASRL/batch-informed-trees,florianhauer/ompl,sonny-tarbouriech/ompl,utiasASRL/batch-informed-trees,jvgomez/ompl,jvgomez/ompl