Remove unused NOTIFICATION_CLEARABLE_REFACTOR flag

Fixes: 292062937
Flag: NA
Test: atest SystemUITests
Change-Id: I7f8ced1da996e7b489421144f242d3bcb76aad9e
diff --git a/packages/SystemUI/src/com/android/systemui/flags/Flags.kt b/packages/SystemUI/src/com/android/systemui/flags/Flags.kt
index b1d4587..88ae03c 100644
--- a/packages/SystemUI/src/com/android/systemui/flags/Flags.kt
+++ b/packages/SystemUI/src/com/android/systemui/flags/Flags.kt
@@ -17,11 +17,11 @@
 
 import android.provider.DeviceConfig
 import com.android.internal.annotations.Keep
-import com.android.systemui.res.R
 import com.android.systemui.flags.FlagsFactory.releasedFlag
 import com.android.systemui.flags.FlagsFactory.resourceBooleanFlag
 import com.android.systemui.flags.FlagsFactory.sysPropBooleanFlag
 import com.android.systemui.flags.FlagsFactory.unreleasedFlag
+import com.android.systemui.res.R
 
 /**
  * List of [Flag] objects for use in SystemUI.
@@ -608,11 +608,6 @@
     val BIGPICTURE_NOTIFICATION_LAZY_LOADING =
         unreleasedFlag("bigpicture_notification_lazy_loading")
 
-    // TODO(b/292062937): Tracking bug
-    @JvmField
-    val NOTIFICATION_CLEARABLE_REFACTOR =
-            unreleasedFlag("notification_clearable_refactor")
-
     // TODO(b/283740863): Tracking Bug
     @JvmField
     val ENABLE_NEW_PRIVACY_DIALOG = releasedFlag("enable_new_privacy_dialog")