[browser][WBT] Remove MT signalR tests (#118323)

* Remove MT-only signalR tests

Author: ilonatommy

eng/testing/scenarios/BuildWasmAppsJobsList.txt

@@ -14,7 +14,6 @@ Wasm.Build.Tests.Blazor.DllImportTests
 Wasm.Build.Tests.Blazor.NativeTests
 Wasm.Build.Tests.Blazor.NoopNativeRebuildTest
 Wasm.Build.Tests.Blazor.WorkloadRequiredTests
-Wasm.Build.Tests.Blazor.SignalRClientTests
 Wasm.Build.Tests.Blazor.EventPipeDiagnosticsTests
 Wasm.Build.Tests.BuildPublishTests
 Wasm.Build.Tests.ConfigSrcTests
@@ -38,7 +37,6 @@ Wasm.Build.Tests.LibraryInitializerTests
 Wasm.Build.Tests.SatelliteLoadingTests
 Wasm.Build.Tests.ModuleConfigTests
 Wasm.Build.Tests.MemoryTests
-Wasm.Build.Tests.AspNetCore.SignalRClientTests
 Wasm.Build.Tests.WasmBuildAppTest
 Wasm.Build.Tests.WasmNativeDefaultsTests
 Wasm.Build.Tests.WasmRunOutOfAppBundleTests