obsolete 6-phosophogluco-3-phosphogluco-starch phosphatase activity (obsolete GO:0102222)
OBSOLETE. Catalysis of the reaction: m+q H2O + a 6-phosphogluco-3-phosphogluco-amylopectin = m+q hydrogenphosphate + a 6-phosphogluco-3-phosphogluco-amylopectin.