change the condition when execute self.__matmul_nosharding() (#49)

Co-authored-by: Guoshuai Zhao <guzhao@microsoft.com>

superbench/benchmarks/micro_benchmarks/sharding_matmul.py

@@ -221,7 +221,7 @@ def _benchmark(self):
         K = self._args.k
         N = self._args.n
         for mode in self._args.mode:
-            if mode == ShardingMode.NOSHARDING or self.__world_size == 1:
+            if mode == ShardingMode.NOSHARDING:
                 elapse_times = self.__matmul_nosharding(M, K, N)
             elif mode == ShardingMode.ALLREDUCE:
                 elapse_times = self.__matmul_allreduce(M, K, N)