There is no bin/ directory anymore

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Ooops... do not try to cd into pom-scijava twice

With the recent changes, we are already in pom-scijava by the time
we deploy.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>