I was looking for a way to bulk unschedule tasks from the agenda view. There is a function included in org-mode
for bulk-unschedule
according to Carsten Dominik, but was not sure how to find this in Spacemacs.
I figured it out.
The solutions is to use SPC u B s
. You mark the items you want to unschedule and then use this key combination to bulk unschedule them.