Warnings when I build my Android apk

I get 36 Warnings that are all nearly the same. The ending is everytime:

warning CS0618: GooglePlayGames.BasicApi.Quests.IQuestMilestone' is obsolete: Quests are being removed in 2018.’

One specific Example:

Assets/GooglePlayGames/Platforms/Native/NativeQuestClient.cs(87,76): warning CS0618: GooglePlayGames.BasicApi.Quests.IQuestMilestone' is obsolete: Quests are being removed in 2018.’

Please help.

same

This warning is just to let you know that the Google Play Games quests service will be deprecated as of March 31st 2018.
It’s a simple reminder that you should not use the Google Play Games quests API in your new apps.

To get read of this message search for the following string in your solution and comment it:

[Obsolete("Quests are being removed in 2018.")]

List of files that contain this string:

PlayGamesPlatform.cs

IQuestsClient.cs

IQuestMilestone.cs