obsolete [protein]-3-O-(N-acetyl-D-glucosaminyl)-L-threonine O-N-acetyl-alpha-D-glucosaminase activity (obsolete GO:0102166)
OBSOLETE. Catalysis of the reaction: H2O + an N-acetyl-alpha-D-glucosaminyl-L-threonine-[glycoprotein] = N-acetyl-alpha-D-glucosaminide + a [protein]-L-threonine.