Revert the test of aten::_scaled_dot_product_efficient_attention (#1853)

Revert it back to the original test. We can revisit and secure the test
when we have spare time.

tests/function_libs/torch_lib/extra_opinfo.py

@@ -1325,7 +1325,6 @@ def sample_inputs__scaled_dot_product_efficient_attention(
 
     dim_4_q_shape = (batch, num_heads, seq_q, head_dim)
     dim_4_kv_shape = (batch, num_heads, seq_kv, head_dim)
-    shape_attn_bias = (batch, num_heads, seq_q, seq_kv)
 
     qkv_shapes = [(dim_4_q_shape, dim_4_kv_shape)]
 
@@ -1339,7 +1338,7 @@ def sample_inputs__scaled_dot_product_efficient_attention(
                 make(shape_q),
                 make(shape_kv),
                 make(shape_kv),
-                attn_bias=make(shape_attn_bias),
+                attn_bias=None,  # TODO: Add attn_bias
                 is_causal=is_causal,
                 dropout_p=dropout_p,
                 compute_log_sumexp=compute_log_sumexp,