You cannot remove them wholesale. Annex VII lists the documents to be provided where applicable: if an item does not apply, you must justify this in the documentation, explaining why the requirement does not apply and citing the exemption, rather than deleting it. The list of standards and specifications applied (point d) and test reports (point f), for example on the heavy metal limit, are still required in principle for all packaging. The description of recyclability, minimisation and reusability assessments (point e) is less extensive for packaging exempted from Article 6, but the exemption must be stated explicitly and the other assessments must still be described where they apply.
Read the source article: PPWR EU declaration of conformity: required contents