parse: Move variable to block where it's used

parse: Move variable to block where it's used

There was a dead assignment used outside of the bin/pipeline creation
which was confusing (and unused). Just move that variable to
where it is actually used.

(Note that that variable was not needed outside of that block since
the refactoring done in 2b33d3318519fd613dd5a4ebbd7c308609904e68 )