Dreambooth lora flux bug 3dtensor to 2dtensor (#9653)

* fixed issue #9350, Tensor is deprecated

* ran make style

examples/dreambooth/train_dreambooth_lora_flux.py

@@ -985,7 +985,6 @@ def encode_prompt(
     text_input_ids_list=None,
 ):
     prompt = [prompt] if isinstance(prompt, str) else prompt
-    batch_size = len(prompt)
     dtype = text_encoders[0].dtype
 
     pooled_prompt_embeds = _encode_prompt_with_clip(
@@ -1007,8 +1006,7 @@ def encode_prompt(
         text_input_ids=text_input_ids_list[1] if text_input_ids_list else None,
     )
 
-    text_ids = torch.zeros(batch_size, prompt_embeds.shape[1], 3).to(device=device, dtype=dtype)
-    text_ids = text_ids.repeat(num_images_per_prompt, 1, 1)
+    text_ids = torch.zeros(prompt_embeds.shape[1], 3).to(device=device, dtype=dtype)
 
     return prompt_embeds, pooled_prompt_embeds, text_ids