Remove dead code

Summary: This helper function doesn't seem to be used anywhere anymore. https://fburl.com/code/ole9n4sb

Reviewed By: srikrishnagopu

Differential Revision: D61233282

fbshipit-source-id: b54141f4b1fbfabe2198470bd489f37e3d9ac82a

fboss/agent/hw/sai/benchmarks/benchmarks.bzl

@@ -52,7 +52,3 @@ def sai_mono_agent_benchmark(name, srcs, **kwargs):
 
 def sai_multi_switch_agent_benchmark(name, srcs, **kwargs):
     _multi_switch_agent_benchmark_binary(name, srcs, **kwargs)
-
-def sai_agent_benchmark(name, srcs, **kwargs):
-    sai_mono_agent_benchmark(name, srcs, **kwargs)
-    sai_multi_switch_agent_benchmark(name, srcs, **kwargs)