minor changes

app/src/main/java/chat/rocket/android/chatroom/ui/ChatRoomFragment.kt

@@ -76,7 +76,7 @@ import kotlinx.android.synthetic.main.message_composer.*
 import kotlinx.android.synthetic.main.message_list.*
 import java.io.File
 import java.io.FileOutputStream
-import java.util.*
+import java.util.UUID
 import java.util.concurrent.TimeUnit
 import java.util.concurrent.atomic.AtomicInteger
 import javax.inject.Inject
@@ -965,4 +965,4 @@ class ChatRoomFragment : Fragment(), ChatRoomView, EmojiKeyboardListener, EmojiR
     private fun setupToolbar(toolbarTitle: String) {
         (activity as ChatRoomActivity).showToolbarTitle(toolbarTitle)
     }
-}
+}
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