Move avalanche throttling to a new flag to avoid teamfood issues.

Test: n/a
Flag: com.android.systemui.notification_avalanche_throttle_hun
Bug: 307288824
Change-Id: I9bda5afc0afccc9989e20b36ba5f54b6a7bf13c6
diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index 7ce8f98..dcca845 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -177,16 +177,9 @@
 }
 
 flag {
-    name: "notification_throttle_hun"
-    namespace: "systemui"
-    description: "During notification avalanche, throttle HUNs showing in fast succession."
-    bug: "307288824"
-}
-
-flag {
     name: "notification_avalanche_throttle_hun"
     namespace: "systemui"
-    description: "(currently unused) During notification avalanche, throttle HUNs showing in fast succession."
+    description: "During notification avalanche, throttle HUNs showing in fast succession."
     bug: "307288824"
 }