Removes unexecutable lines checking for no scripts with ls

Since ls now runs update if no scripts are present this removes
the now never executed line.
Merge pull request #138 from ethanwhite/cleanup-main

Removes unexecutable lines checking for no scripts with ls
Fix py2app build

py2app’s packages parameter is not the same as setuptools. Setuptools
wants packages and sub-packages whereas py2app’s wants only top-level
packages.

Signed-off-by: Ethan White <ethan@weecology.org>
Merge pull request #143 from ethanwhite/fix-mac-build

Fix py2app build