Consistent saved_model output format (#7032)

models/common.py

@@ -441,7 +441,7 @@ class DetectMultiBackend(nn.Module):
         else:  # TensorFlow (SavedModel, GraphDef, Lite, Edge TPU)
             im = im.permute(0, 2, 3, 1).cpu().numpy()  # torch BCHW to numpy BHWC shape(1,320,192,3)
             if self.saved_model:  # SavedModel
-                y = (self.model(im, training=False) if self.keras else self.model(im)[0]).numpy()
+                y = (self.model(im, training=False) if self.keras else self.model(im)).numpy()
             elif self.pb:  # GraphDef
                 y = self.frozen_func(x=self.tf.constant(im)).numpy()
             else:  # Lite or Edge TPU