Revert "Missed one CompUnit::PrecompStore::FileSystem reference"
Revert "Missed one CompUnit::PrecompStore::FileSystem reference"

This reverts commit 553852bb8b1967c12f961e7a01136121e068e815.

tbrowder/rakudo,tbrowder/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,salortiz/rakudo,labster/rakudo,rakudo/rakudo,MasterDuke17/rakudo,salortiz/rakudo,labster/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,rakudo/rakudo,tbrowder/rakudo,labster/rakudo,rakudo/rakudo,rakudo/rakudo,labster/rakudo,labster/rakudo,tbrowder/rakudo,labster/rakudo,rakudo/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,salortiz/rakudo,rakudo/rakudo,salortiz/rakudo,salortiz/rakudo,MasterDuke17/rakudo,salortiz/rakudo