Workaround for removing UnityEngine.xml that is included for iOS builds

UnityEngineDocsRemover.cs

using System.IO;
using UnityEditor;
using UnityEditor.Callbacks;

/// <summary>
/// Helper class for removing UnityEngine.xml that is included in iOS builds (bug)
/// </summary>
public static class UnityEngineDocsRemover
{
	[PostProcessBuild]
	public static void RemoveDocsFromBuild(BuildTarget buildTarget, string pathToBuiltProject)
	{
		if (buildTarget == BuildTarget.iOS) 
		{
			var xmlDocumentationFiles = Directory.GetFiles(pathToBuiltProject, "UnityEngine.xml", SearchOption.AllDirectories);

			foreach (var xmlDoc in xmlDocumentationFiles)
			{
				UnityEngine.Debug.Log("Removing: " + xmlDoc);

				File.Delete(xmlDoc);
			}
		}
	}
}

UnityEditor does not exist after building the game. Test before sharing.

Oh, sorry I forgot I had to create a folder named "Editor" and put the script there.