Remove vestigal omp/detail/set_operations.h header
Remove vestigal omp/detail/set_operations.h header

raygit/thrust,raygit/thrust,marksantos/thrust,xiongzhanblake/thrust_src,zeryx/thrust,xiongzhanblake/thrust,thrust/thrust,thvasilo/thrust,marksantos/thrust,GrimDerp/thrust,andrewcorrigan/thrust-multi-permutation-iterator,marksantos/thrust,sdalton1/thrust,mohamed-ali/thrust,sarvex/thrust,zhenglaizhang/thrust,xiongzhanblake/thrust,jaredhoberock/thrust,jaredhoberock/thrust,thrust/thrust,sdalton1/thrust,zhenglaizhang/thrust,thvasilo/thrust,xiongzhanblake/thrust_src,arnabgho/thrust,jaredhoberock/thrust,Ricardo666666/thrust,Ricardo666666/thrust,zeryx/thrust,jaredhoberock/thrust,mohamed-ali/thrust,arnabgho/thrust,thrust/thrust,zhenglaizhang/thrust,thvasilo/thrust,sdalton1/thrust,dachziegel/thrust,egaburov/thrust,sarvex/thrust,sarvex/thrust,dachziegel/thrust,xiongzhanblake/thrust_src,raygit/thrust,andrewcorrigan/thrust-multi-permutation-iterator,egaburov/thrust,zeryx/thrust,GrimDerp/thrust,xiongzhanblake/thrust,egaburov/thrust,Ricardo666666/thrust,thrust/thrust,dachziegel/thrust,arnabgho/thrust,GrimDerp/thrust,jaredhoberock/thrust,thrust/thrust,andrewcorrigan/thrust-multi-permutation-iterator,mohamed-ali/thrust