Refactor: Use get_parameter_dtype utility function

Replaces manual parameter iteration with the `get_parameter_dtype` helper.

Author: tolgacangoz

src/diffusers/models/transformers/transformer_skyreels_v2.py

@@ -32,7 +32,7 @@
     get_1d_sincos_pos_embed_from_grid,
 )
 from ..modeling_outputs import Transformer2DModelOutput
-from ..modeling_utils import ModelMixin
+from ..modeling_utils import ModelMixin, get_parameter_dtype
 from ..normalization import FP32LayerNorm
 
 
@@ -198,7 +198,7 @@ def forward(
     ):
         timestep = self.timesteps_proj(timestep)
 
-        time_embedder_dtype = next(iter(self.time_embedder.parameters())).dtype
+        time_embedder_dtype = get_parameter_dtype(self.time_embedder)
         if timestep.dtype != time_embedder_dtype and time_embedder_dtype != torch.int8:
             timestep = timestep.to(time_embedder_dtype)
         temb = self.time_embedder(timestep).type_as(encoder_hidden_states)