Fix tests in AzToolsFramework now that the Trace bus is hooked

Signed-off-by: Esteban Papp <81431996+amznestebanpapp@users.noreply.github.com>

Code/Framework/AzToolsFramework/Tests/ThumbnailerTests.cpp

@@ -20,7 +20,6 @@ namespace UnitTest
 
     class ThumbnailerTests
         : public ::testing::Test
-        , public TraceBusRedirector
     {
     protected:
         void SetUp() override
@@ -31,8 +30,6 @@ namespace UnitTest
             // was running, because the environment wasn't setup for it to save these settings.
             AZ::UserSettingsComponentRequestBus::Broadcast(&AZ::UserSettingsComponentRequests::DisableSaveOnFinalize);
 
-            TraceBusRedirector::BusConnect();
-
             AZStd::string entityName("test");
             AZ::EntityId testEntityId;
             AzToolsFramework::EditorEntityContextRequestBus::BroadcastResult(
@@ -61,8 +58,6 @@ namespace UnitTest
 
         void TearDown() override
         {
-            TraceBusRedirector::BusDisconnect();
-
             AzToolsFramework::EditorEntityContextRequestBus::Broadcast(
                 &AzToolsFramework::EditorEntityContextRequestBus::Events::DestroyEditorEntity,
                 m_testEntity->GetId());