remove attention mask for self-attention

Author: a-r-r-o-w

src/diffusers/pipelines/allegro/pipeline_allegro.py

@@ -843,6 +843,8 @@ def __call__(
         if do_classifier_free_guidance:
             prompt_embeds = torch.cat([negative_prompt_embeds, prompt_embeds], dim=0)
             prompt_attention_mask = torch.cat([negative_prompt_attention_mask, prompt_attention_mask], dim=0)
+        if prompt_embeds.ndim == 3:
+            prompt_embeds = prompt_embeds.unsqueeze(1)  # b l d -> b 1 l d
 
         # 4. Prepare timesteps
         timesteps, num_inference_steps = retrieve_timesteps(self.scheduler, num_inference_steps, device, timesteps)
@@ -884,17 +886,9 @@ def __call__(
                 # broadcast to batch dimension in a way that's compatible with ONNX/Core ML
                 timestep = t.expand(latent_model_input.shape[0])
 
-                if prompt_embeds.ndim == 3:
-                    prompt_embeds = prompt_embeds.unsqueeze(1)  # b l d -> b 1 l d
-
-                # prepare attention_mask.
-                # b c t h w -> b t h w
-                attention_mask = torch.ones_like(latent_model_input)[:, 0]
-
                 # predict noise model_output
                 noise_pred = self.transformer(
-                    latent_model_input,
-                    attention_mask=attention_mask,
+                    hidden_states=latent_model_input,
                     encoder_hidden_states=prompt_embeds,
                     encoder_attention_mask=prompt_attention_mask,
                     timestep=timestep,