Undefined name 'mask_utils' in segmentation_mask.py

[cclauss]

https://github.com/zhangxiaosong18/FreeAnchor/search?q=mask_utils&unscoped_q=mask_utils

flake8 testing of https://github.com/zhangxiaosong18/FreeAnchor on Python 3.7.1

$ flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics

./maskrcnn_benchmark/structures/segmentation_mask.py:126:20: F821 undefined name 'mask_utils'
            rles = mask_utils.frPyObjects(
                   ^
./maskrcnn_benchmark/structures/segmentation_mask.py:129:19: F821 undefined name 'mask_utils'
            rle = mask_utils.merge(rles)
                  ^
./maskrcnn_benchmark/structures/segmentation_mask.py:130:20: F821 undefined name 'mask_utils'
            mask = mask_utils.decode(rle)
                   ^
3     F821 undefined name 'mask_utils'
3

E901,E999,F821,F822,F823 are the "showstopper" flake8 issues that can halt the runtime with a SyntaxError, NameError, etc. These 5 are different from most other flake8 issues which are merely "style violations" -- useful for readability but they do not effect runtime safety.

• F821: undefined name name
• F822: undefined name name in __all__
• F823: local variable name referenced before assignment
• E901: SyntaxError or IndentationError
• E999: SyntaxError -- failed to compile a file into an Abstract Syntax Tree

[zhangxiaosong18]

I didn't notice this code, it's actually unnecessary, I will delete it, thank you for your suggestion.