[BFCL] Remove parallel tool calling test from gpt-oss model (vllm-project#21)

Signed-off-by: Tarun Kumar <takumar@redhat.com>

Author: tarukumar

workloads/gpt_oss_120b_h200.yaml

@@ -31,8 +31,6 @@ bfcl:
   test_categories:
     - simple_python
     - multiple
-    - parallel
-    - parallel_multiple
     - multi_turn
   num_threads: 8