IECore : Remove `boost/filesystem/convenience.hpp` includes#1505

murraystevenson wants to merge 1 commit intoImageEngine:RB-10.6ImageEngine/cortex:RB-10.6from

murraystevenson:removeBoostFilesystemConveniencemurraystevenson/cortex:removeBoostFilesystemConvenienceCopy head branch name to clipboard