Fix test broken by D73809989 (#153413)

Summary:
I forgot to remove this unused field in D73809989.

X-link: pytorch/pytorch#153413
Approved by: https://github.com/c00w

Reviewed By: jeanschmidt

Differential Revision: D74729288

fbshipit-source-id: d82727b485c8c187ac5ab9b91f6f62927c7511f7

Author: masnesral

userbenchmark/dynamo/dynamobench/_dynamo/utils.py

@@ -1245,7 +1245,6 @@ class CompilationMetrics:
     runtime_cudagraphify_time_us: Optional[int] = None
     runtime_triton_autotune_time_us: Optional[int] = None
     dynamo_compile_time_before_restart_us: Optional[int] = None
-    cuda_synchronize_time_us: Optional[int] = None  # TODO: instrument
     distributed_ephemeral_timeout_us: Optional[int] = None
     structured_logging_overhead_us: Optional[int] = None
     remote_fx_graph_cache_get_time_us: Optional[int] = None