set roaming type to default for Notification state utils

Author: samgst-amazon

plugins/core/jetbrains-community/src/software/aws/toolkits/jetbrains/core/notifications/NotificationStateUtils.kt

@@ -4,7 +4,6 @@
 package software.aws.toolkits.jetbrains.core.notifications
 
 import com.intellij.openapi.components.PersistentStateComponent
-import com.intellij.openapi.components.RoamingType
 import com.intellij.openapi.components.Service
 import com.intellij.openapi.components.State
 import com.intellij.openapi.components.Storage