Revert "qkv"

This reverts commit cfad87d56b207199f6380882371c5b31639b8c41.

fa3.py

@@ -36,9 +36,9 @@ class FlashFusedFluxAttnProcessor3_0:
         batch_size, _, _ = hidden_states.shape if encoder_hidden_states is None else encoder_hidden_states.shape
 
         # `sample` projections.
-        query = attn.to_q(hidden_states)
-        key = attn.to_k(hidden_states)
-        value = attn.to_v(hidden_states)
+        qkv = attn.to_qkv(hidden_states)
+        split_size = qkv.shape[-1] // 3
+        query, key, value = torch.split(qkv, split_size, dim=-1)
 
         inner_dim = key.shape[-1]
         head_dim = inner_dim // attn.heads