Remove an unnecessary decont on a hot path
Remove an unnecessary decont on a hot path

This is basically a revert of 97020cb342 from 2015.  I don't think
this is still a problem on the JVM backend.

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