Remove SUSE 11 from CI testing
Remove SUSE 11 from CI testing

It ships OpenSSL 0.9.8, which doesn't support
TLS 1.2, making it impossible to install packages
from PyPI once all previous protocols are disabled.

mongodb/mongo-python-driver,mongodb/mongo-python-driver,ShaneHarvey/mongo-python-driver,ShaneHarvey/mongo-python-driver,mongodb/mongo-python-driver,ShaneHarvey/mongo-python-driver