diff --git a/core-modules/006QubesAdminVm.py b/core-modules/006QubesAdminVm.py
index 24274f91..733c3740 100644
--- a/core-modules/006QubesAdminVm.py
+++ b/core-modules/006QubesAdminVm.py
@@ -52,9 +52,6 @@ class QubesAdminVm(QubesNetVm):
     def get_power_state(self):
         return "Running"
 
-    def get_disk_usage(self, file_or_dir):
-        return 0
-
     def get_disk_utilization(self):
         return 0
 
diff --git a/core-modules/01QubesHVm.py b/core-modules/01QubesHVm.py
index 2033bf52..3e2bb293 100644
--- a/core-modules/01QubesHVm.py
+++ b/core-modules/01QubesHVm.py
@@ -236,9 +236,6 @@ class QubesHVm(QubesVm):
         for hook in self.hooks_create_on_disk:
             hook(self, verbose, source_template=source_template)
 
-    def get_disk_utilization_private_img(self):
-        return self.get_disk_usage(self.private_img)
-
     def get_private_img_sz(self):
         if not os.path.exists(self.private_img):
             return 0