temporarily disable cpp_single_channel_troughput

tools/run_tests/performance/scenario_config.py

@@ -201,34 +201,6 @@ class CXXLanguage:
           'warmup_seconds': WARMUP_SECONDS,
           'benchmark_seconds': BENCHMARK_SECONDS
       }
-      yield {
-          'name': 'cpp_single_channel_throughput_%s'
-                  % secstr,
-          'num_servers': 1,
-          'num_clients': 1,
-          'client_config': {
-            'client_type': 'ASYNC_CLIENT',
-            'security_params': secargs,
-            'outstanding_rpcs_per_channel': DEEP,
-            'client_channels': 1,
-            'async_client_threads': 0,
-            'rpc_type': 'STREAMING',
-            'load_params': {
-              'closed_loop': {}
-            },
-            'payload_config': BIG_GENERIC_PAYLOAD,
-            'histogram_params': HISTOGRAM_PARAMS,
-          },
-          'server_config': {
-            'server_type': 'ASYNC_GENERIC_SERVER',
-            'security_params': secargs,
-            'core_limit': SINGLE_MACHINE_CORES/2,
-            'async_server_threads': 0,
-            'payload_config': BIG_GENERIC_PAYLOAD,
-          },
-          'warmup_seconds': WARMUP_SECONDS,
-          'benchmark_seconds': BENCHMARK_SECONDS
-      }
       yield {
           'name': 'cpp_protobuf_async_streaming_ping_pong_%s'
                   % secstr,