OSIS-3230 Remove redundant form.is_valid check
OSIS-3230 Remove redundant form.is_valid check

	modified:   base/forms/education_group/training.py

uclouvain/OSIS-Louvain,uclouvain/OSIS-Louvain,uclouvain/OSIS-Louvain,uclouvain/osis,uclouvain/osis,uclouvain/osis,uclouvain/osis