diff --git a/shell/browser/api/electron_api_power_monitor_mac.mm b/shell/browser/api/electron_api_power_monitor_mac.mm
index 347d0d17d7bc..76801e71c0ab 100644
--- a/shell/browser/api/electron_api_power_monitor_mac.mm
+++ b/shell/browser/api/electron_api_power_monitor_mac.mm
@@ -34,17 +34,6 @@
                            selector:@selector(onScreenUnlocked:)
                                name:@"com.apple.screenIsUnlocked"
                              object:nil];
-    // A notification that the workspace posts before the machine goes to sleep.
-    [distributed_center addObserver:self
-                           selector:@selector(isSuspending:)
-                               name:NSWorkspaceWillSleepNotification
-                             object:nil];
-    // A notification that the workspace posts when the machine wakes from
-    // sleep.
-    [distributed_center addObserver:self
-                           selector:@selector(isResuming:)
-                               name:NSWorkspaceDidWakeNotification
-                             object:nil];
 
     NSNotificationCenter* shared_center =
         [[NSWorkspace sharedWorkspace] notificationCenter];
@@ -73,18 +62,6 @@
   self->emitters.push_back(monitor_);
 }
 
-- (void)isSuspending:(NSNotification*)notify {
-  for (auto* emitter : self->emitters) {
-    emitter->Emit("suspend");
-  }
-}
-
-- (void)isResuming:(NSNotification*)notify {
-  for (auto* emitter : self->emitters) {
-    emitter->Emit("resume");
-  }
-}
-
 - (void)onScreenLocked:(NSNotification*)notification {
   for (auto* emitter : self->emitters) {
     emitter->Emit("lock-screen");
diff --git a/shell/browser/api/electron_api_power_monitor_win.cc b/shell/browser/api/electron_api_power_monitor_win.cc
index 7668234bb3ef..40da9224527c 100644
--- a/shell/browser/api/electron_api_power_monitor_win.cc
+++ b/shell/browser/api/electron_api_power_monitor_win.cc
@@ -88,18 +88,6 @@ LRESULT CALLBACK PowerMonitor::WndProc(HWND hwnd,
                            base::Unretained(this)));
       }
     }
-  } else if (message == WM_POWERBROADCAST) {
-    if (wparam == PBT_APMRESUMEAUTOMATIC) {
-      content::GetUIThreadTaskRunner({})->PostTask(
-          FROM_HERE,
-          base::BindOnce([](PowerMonitor* pm) { pm->Emit("resume"); },
-                         base::Unretained(this)));
-    } else if (wparam == PBT_APMSUSPEND) {
-      content::GetUIThreadTaskRunner({})->PostTask(
-          FROM_HERE,
-          base::BindOnce([](PowerMonitor* pm) { pm->Emit("suspend"); },
-                         base::Unretained(this)));
-    }
   }
   return ::DefWindowProc(hwnd, message, wparam, lparam);
 }