Update test_layer_norm.py

Skip an additional test

Author: Erik-Lundell

backends/arm/test/ops/test_layer_norm.py

@@ -148,8 +148,8 @@ def test_layer_norm_tosa_BI(
             self.LayerNorm(*model_params), (test_data,)
         )
 
-    # Skip last test since it requires transpose.
-    @parameterized.expand(test_data_suite[:-1])
+    # Skip tests that require transposes.
+    @parameterized.expand(test_data_suite[:-2])
     def test_layer_norm_u55_BI(
         self,
         test_name: str,