Fix stable diffusion onnx pipeline error when batch_size > 1 (huggingface#2366)

fix safety_checker for batch_size > 1

Author: tianleiwu

src/diffusers/pipelines/stable_diffusion/pipeline_onnx_stable_diffusion.py

@@ -303,9 +303,6 @@ def __call__(
                 self.numpy_to_pil(image), return_tensors="np"
             ).pixel_values.astype(image.dtype)
 
-            image, has_nsfw_concepts = self.safety_checker(clip_input=safety_checker_input, images=image)
-
-            # There will throw an error if use safety_checker batchsize>1
             images, has_nsfw_concept = [], []
             for i in range(image.shape[0]):
                 image_i, has_nsfw_concept_i = self.safety_checker(