Xamarin ios Rejection-due to the UIWebview in Xamarin.Forms.Platform.iOS.What package is this?

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I have received this warning after adding –warn-on-type-ref=UIKit.UIWebView in mtouch arguments.
And I could understand there is a nuget package named ‘refractored.XamForms.PullToRefresh’ in my project.I have removed that nuget package from my project and now the only warning which I am receiving is

current error
so can anyone help me to find out the package: ‘Xamarin.Forms.Platform.iOs‘.
I am not having such a package in my project.

Application will be rejected by Apple If I am upload this application with this error.

Source: Xamarin.ios Questions