The mere deletion of subject-matter in the parent application is not prejudicial to the later filing of a divisional application. When deleting subject-matter, the applicant should, however, avoid any statements which could be interpreted as abandonment with substantive effect, thereby impeding the valid filing of a divisional application for that subject-matter (see also H‑III, 2.5, last paragraph).
Source: http://www.epo.org/law-practice/legal-texts/html/guidelines/e/c_ix_1_3.htm
Date retrieved: 17 May 2021