Fix duplicated logs on windows

src/citra_qt/debugger/console.cpp

@@ -34,6 +34,12 @@ void ToggleConsole() {
             freopen_s(&temp, "NUL", "w", stderr);
         }
     }
+#else
+    if (UISettings::values.show_console) {
+        Log::AddBackend(std::make_unique<Log::ColorConsoleBackend>());
+    } else {
+        Log::RemoveBackend(Log::ColorConsoleBackend::Name());
+    }
 #endif
 }
 } // namespace Debugger