!13 【轻量级 PR】：update tutorials/source_en/use/debugging_in_pynative_mode.md....

!13 【轻量级 PR】：update tutorials/source_en/use/debugging_in_pynative_mode.md. Remove duplicate import numpy
Merge pull request !13 from cathwong/N/A

tutorials/source_en/use/debugging_in_pynative_mode.md

@@ -108,7 +108,6 @@ MindSpore provides the staging function to improve the execution speed of infere
 
 ```python
 import numpy as np
-import numpy as np
 import mindspore.nn as nn
 from mindspore import context, Tensor
 import mindspore.ops.operations as P