Delete single client nn modules

[luqiang-guo]

删除single_client下的nn/modules

[hjchen2]

把python/oneflow/compatible/single_client/F这个目录也删了

[github-actions]

Speed stats:

GPU Name: GeForce GTX 1080 

OneFlow resnet50 time: 128.2ms (= 6411.3ms / 50, input_shape=[16, 3, 224, 224], backward is enabled)
OneFlow GPU used (rank 0): 0 MiB
PyTorch resnet50 time: 142.0ms (= 7099.6ms / 50, input_shape=[16, 3, 224, 224], backward is enabled)
PyTorch GPU used (rank 0, estimated): 0 MiB
Relative speed: 1.11 (= 142.0ms / 128.2ms)

OneFlow resnet50 time: 74.4ms (= 3721.2ms / 50, input_shape=[8, 3, 224, 224], backward is enabled)
OneFlow GPU used (rank 0): 0 MiB
PyTorch resnet50 time: 84.7ms (= 4236.2ms / 50, input_shape=[8, 3, 224, 224], backward is enabled)
PyTorch GPU used (rank 0, estimated): 0 MiB
Relative speed: 1.14 (= 84.7ms / 74.4ms)

OneFlow resnet50 time: 49.7ms (= 2484.7ms / 50, input_shape=[4, 3, 224, 224], backward is enabled)
OneFlow GPU used (rank 0): 0 MiB
PyTorch resnet50 time: 58.6ms (= 2930.8ms / 50, input_shape=[4, 3, 224, 224], backward is enabled)
PyTorch GPU used (rank 0, estimated): 0 MiB
Relative speed: 1.18 (= 58.6ms / 49.7ms)

OneFlow resnet50 time: 40.1ms (= 2004.1ms / 50, input_shape=[2, 3, 224, 224], backward is enabled)
OneFlow GPU used (rank 0): 0 MiB
PyTorch resnet50 time: 50.3ms (= 2513.6ms / 50, input_shape=[2, 3, 224, 224], backward is enabled)
PyTorch GPU used (rank 0, estimated): 0 MiB
Relative speed: 1.25 (= 50.3ms / 40.1ms)

OneFlow resnet50 time: 39.7ms (= 1983.0ms / 50, input_shape=[1, 3, 224, 224], backward is enabled)
OneFlow GPU used (rank 0): 0 MiB
PyTorch resnet50 time: 42.0ms (= 2099.7ms / 50, input_shape=[1, 3, 224, 224], backward is enabled)
PyTorch GPU used (rank 0, estimated): 0 MiB
Relative speed: 1.06 (= 42.0ms / 39.7ms)

OneFlow resnet50 time: 143.0ms (= 7150.7ms / 50, input_shape=[16, 3, 224, 224], backward is enabled)
OneFlow GPU used (rank 0): 0 MiB
PyTorch resnet50 time: 148.9ms (= 7444.7ms / 50, input_shape=[16, 3, 224, 224], backward is enabled)
PyTorch GPU used (rank 0, estimated): 0 MiB
Relative speed: 1.04 (= 148.9ms / 143.0ms)

OneFlow resnet50 time: 89.1ms (= 4454.1ms / 50, input_shape=[8, 3, 224, 224], backward is enabled)
OneFlow GPU used (rank 0): 0 MiB
PyTorch resnet50 time: 92.6ms (= 4630.6ms / 50, input_shape=[8, 3, 224, 224], backward is enabled)
PyTorch GPU used (rank 0, estimated): 0 MiB
Relative speed: 1.04 (= 92.6ms / 89.1ms)

OneFlow resnet50 time: 68.0ms (= 3401.0ms / 50, input_shape=[4, 3, 224, 224], backward is enabled)
OneFlow GPU used (rank 0): 0 MiB
PyTorch resnet50 time: 71.4ms (= 3571.6ms / 50, input_shape=[4, 3, 224, 224], backward is enabled)
PyTorch GPU used (rank 0, estimated): 0 MiB
Relative speed: 1.05 (= 71.4ms / 68.0ms)

OneFlow resnet50 time: 61.8ms (= 3089.3ms / 50, input_shape=[2, 3, 224, 224], backward is enabled)
OneFlow GPU used (rank 0): 0 MiB
PyTorch resnet50 time: 58.9ms (= 2942.8ms / 50, input_shape=[2, 3, 224, 224], backward is enabled)
PyTorch GPU used (rank 0, estimated): 0 MiB
Relative speed: 0.95 (= 58.9ms / 61.8ms)

OneFlow resnet50 time: 61.5ms (= 3077.1ms / 50, input_shape=[1, 3, 224, 224], backward is enabled)
OneFlow GPU used (rank 0): 0 MiB
PyTorch resnet50 time: 53.2ms (= 2661.9ms / 50, input_shape=[1, 3, 224, 224], backward is enabled)
PyTorch GPU used (rank 0, estimated): 0 MiB
Relative speed: 0.87 (= 53.2ms / 61.5ms)