Remove warning about half precision on MPS (huggingface#1163)

Remove warning about half precision on MPS.

Author: pcuenca

src/diffusers/pipeline_utils.py

@@ -209,13 +209,13 @@ def to(self, torch_device: Optional[Union[str, torch.device]] = None):
         for name in module_names.keys():
             module = getattr(self, name)
             if isinstance(module, torch.nn.Module):
-                if module.dtype == torch.float16 and str(torch_device) in ["cpu", "mps"]:
+                if module.dtype == torch.float16 and str(torch_device) in ["cpu"]:
                     logger.warning(
-                        "Pipelines loaded with `torch_dtype=torch.float16` cannot run with `cpu` or `mps` device. It"
-                        " is not recommended to move them to `cpu` or `mps` as running them will fail. Please make"
-                        " sure to use a `cuda` device to run the pipeline in inference. due to the lack of support for"
-                        " `float16` operations on those devices in PyTorch. Please remove the"
-                        " `torch_dtype=torch.float16` argument, or use a `cuda` device to run inference."
+                        "Pipelines loaded with `torch_dtype=torch.float16` cannot run with `cpu` device. It"
+                        " is not recommended to move them to `cpu` as running them will fail. Please make"
+                        " sure to use an accelerator to run the pipeline in inference, due to the lack of"
+                        " support for`float16` operations on this device in PyTorch. Please, remove the"
+                        " `torch_dtype=torch.float16` argument, or use another device for inference."
                     )
                 module.to(torch_device)
         return self