Remove MySQL as something we advertise for EE
Solves marketing#1005
Since @yorickpeterse and @DouweM are "fairly sure we will drop MySQL support over time" we should probably stop advertising it.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Solves marketing#1005
Since @yorickpeterse and @DouweM are "fairly sure we will drop MySQL support over time" we should probably stop advertising it.