Remove the Python tests
In !174 (merged), I removed the Python tests from the Platform by marking them as "devel".
That made the Platform ~120MB smaller, but they are still in the Sdk.
After thinking some more about it, we really should have removed them from the start.
$ du -sh python*/test python*/*/test python*/*/tests | sort -hr
67M python3.6/test
36M python2.7/test
2.6M python3.6/unittest/test
2.2M python3.6/ctypes/test
1.9M python3.6/distutils/tests
1.7M python2.7/ctypes/test
1.5M python3.6/lib2to3/tests
1.5M python2.7/distutils/tests
1.4M python2.7/email/test
1.2M python2.7/bsddb/test
992K python2.7/unittest/test
716K python3.6/sqlite3/test
544K python2.7/sqlite3/test
472K python2.7/json/tests
Edited by Mathieu Bridon