Remove old version of scala-parser-combinators.jar.
Remove old version of scala-parser-combinators.jar.

Missed committing this as part of
81be4f3f2bead1ba95c8814b7fabd20879a3e397
orc-lang/orc,orc-lang/orc,orc-lang/orc,orc-lang/orc,orc-lang/orc