fix: remove unnecessary import

Signed-off-by: Samuel Meenzen <[email protected]>

Author: meenzen

dotnet-tests/UniffiCS.Tests/TestBigEndianStream.cs

@@ -2,8 +2,6 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-using UniffiCS.Tests.gen;
-
 namespace UniffiCS.Tests;
 
 using System;