update test script

Author: fsx950223

.github/workflows/python-app.yml

@@ -28,9 +28,6 @@ jobs:
         pip install pylint Cython
         pip install -r efficientdet/requirements.txt
         pip install pycocotools==2.0.0
-    - name: Lint with pylint
-      run: |
-        pylint --rcfile=.pylintrc `find $PWD -name 'efficientdet/*_test.py'`
     - name: Test with pytest
       run: |
         bash efficientdet/test.sh