[tests] Remove some ignores for issues that have been fixed. (#12527)

tests/introspection/ApiPInvokeTest.cs

@@ -215,10 +215,6 @@ protected void Check (Assembly a)
 						// load from executable (like __Internal above since it's part of the static library)
 						path = null;
 						break;
-					case "libhostpolicy":
-						// There's no libhostpolicy library.
-						// https://github.com/dotnet/runtime/issues/38543
-						continue;
 					case "libSystem.Native":
 						path += ".dylib";
 						break;

tests/linker/ios/link all/DataContractTest.cs

@@ -70,10 +70,6 @@ public enum SomeTypes {
 		[Test]
 		public void Flags ()
 		{
-#if NET && !__MACOS__
-			if (Runtime.Arch == Arch.DEVICE)
-				Assert.Ignore ("https://github.com/dotnet/runtime/issues/47114");
-#endif
 			var t1 = new TestClass (SomeTypes.Audio | SomeTypes.Image);
 			var st = ToXml (t1);
 			var t2 = FromXml<TestClass> (st);

tests/linker/ios/link sdk/LinkSdkRegressionTest.cs

@@ -87,10 +87,6 @@ public void MonoAssembly_LinkedOut ()
 		// https://bugzilla.novell.com/show_bug.cgi?id=688414
 		public void Bug205_ExposingIEnumerable ()
 		{
-#if NET && !__MACOS__
-			if (Runtime.Arch == Arch.DEVICE)
-				Assert.Ignore ("https://github.com/dotnet/runtime/issues/47114");
-#endif
 			var ds = new DataContractSerializer (typeof (IEnumerable<int>));
 			using (var xw = XmlWriter.Create (System.IO.Stream.Null))
 				ds.WriteObject (xw, new int [] { 1, 2, 3 });
@@ -443,10 +439,6 @@ public void Sqlite_ReadOnly ()
 		[Test]
 		public void AsQueryable_3028 ()
 		{
-#if NET && !__MACOS__
-			if (Runtime.Arch == Arch.DEVICE)
-				Assert.Ignore ("https://github.com/dotnet/runtime/issues/47112");
-#endif
 			string [] foos = new string [] { "hi", "bye" };
 			string f = foos.AsQueryable ().First ();
 			Assert.That (f, Is.EqualTo ("hi"), "f");