[tests] we can assert 0 trimmer warnings again

This is fixed: dotnet/runtime#100256

Author: jonathanpeppers

src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/BuildTest2.cs

@@ -260,12 +260,7 @@ public void BuildHasNoWarnings (bool isRelease, bool xamarinForms, bool multidex
 			proj.SetProperty ("TrimmerSingleWarn", "false");
 			using (var b = CreateApkBuilder (Path.Combine ("temp", TestName))) {
 				Assert.IsTrue (b.Build (proj), "Build should have succeeded.");
-				// FIXME: https://github.com/dotnet/runtime/issues/100256
-				if (!xamarinForms && isRelease) {
-					Assert.IsTrue (StringAssertEx.ContainsText (b.LastBuildOutput, " 4 Warning(s)"), $"{b.BuildLogFile} should have 4 MSBuild warnings.");
-				} else {
-					b.AssertHasNoWarnings ();
-				}
+				b.AssertHasNoWarnings ();
 				Assert.IsFalse (StringAssertEx.ContainsText (b.LastBuildOutput, "Warning: end of file not at end of a line"),
 					"Should not get a warning from the <CompileNativeAssembly/> task.");
 				var lockFile = Path.Combine (Root, b.ProjectDirectory, proj.IntermediateOutputPath, ".__lock");

src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/XASdkTests.cs

@@ -42,12 +42,7 @@ public void DotNetNew ([Values ("android", "androidlib", "android-bindinglib", "
 
 			// Release build
 			Assert.IsTrue (dotnet.Build (parameters: new [] { "Configuration=Release", "TrimmerSingleWarn=false" }), "`dotnet build` should succeed");
-			// FIXME: https://github.com/dotnet/runtime/issues/100256
-			if (template.Contains ("lib")) {
-				dotnet.AssertHasNoWarnings ();
-			} else {
-				Assert.IsTrue (StringAssertEx.ContainsText (dotnet.LastBuildOutput, " 4 Warning(s)"), $"{dotnet.BuildLogFile} should have 4 MSBuild warnings.");
-			}
+			dotnet.AssertHasNoWarnings ();
 		}
 
 		static readonly object[] DotNetPackTargetFrameworks = new object[] {