[AZ-171] Remove unused onnx_batch config, add macOS skip for CoreML tests

Made-with: Cursor

tests/test_export.py

@@ -1,3 +1,4 @@
+import sys
 from pathlib import Path
 
 import cv2
@@ -92,6 +93,7 @@ class TestOnnxExport:
         assert out[0].shape[0] == 4
 
 
+@pytest.mark.skipif(sys.platform != "darwin", reason="CoreML requires macOS")
 class TestCoremlExport:
     def test_coreml_package_created(self, exported_models):
         # Assert