remove unuseful code

visual.py

@@ -164,8 +164,6 @@ class Attention(nn.Module):
         # if qkv_bias:
         #     self.q_bias = nn.Parameter(torch.zeros(all_head_dim))
         #     self.v_bias = nn.Parameter(torch.zeros(all_head_dim))
-        #     qkv_bias = torch.cat((self.q_bias, torch.zeros_like(self.v_bias, requires_grad=False), self.v_bias))
-        #     self.qkv.bias.data = qkv_bias
         # else:
         #     self.q_bias = None
         #     self.v_bias = None