Remove projects_alphabetized from tox.ini

Since the split to project-config, there is no longer a need to
run 'tox' for projects_alphabetized, since those resources no
longer exist. Also removing the shell scripts that were running
the tests.

Change-Id: Ib7a762d872da9c5d945206807c405e7452b49638
Merge "Remove projects_alphabetized from tox.ini"