[CI] Remove flashinfer cache cleanup to reduce unit test runtime (#7476)

Author: EmmonsCurse

tests/layers/test_trtllm_allreduce_rms_fusion.py

@@ -21,12 +21,6 @@
 
 def test_run_distributed():
     """Launch multi-GPU distributed test via paddle.distributed.launch as subprocess"""
-    # clearn flashinfer cache directory
-    flashinfer_cache_dir = os.path.join(os.sep, "root", ".cache", "flashinfer")
-    if os.path.exists(flashinfer_cache_dir):
-        print(f"=== Clearing flashinfer cache directory: {flashinfer_cache_dir} ===")
-        subprocess.run(["rm", "-rf", flashinfer_cache_dir], check=True)
-
     current_dir = os.path.dirname(os.path.abspath(__file__))
     run_script = os.path.join(current_dir, "trtllm_allreduce_rms_fusion.py")
     os.environ["CUDA_VISIBLE_DEVICES"] = "0,1"