Remove duplicate requirements file.

Author: Antoliny0919

.github/workflows/pythonpackage.yml

@@ -38,7 +38,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install -r requirements.txt
+          pip install -r requirements/production.txt
       - name: Lint with flake8
         run: |
           pip install flake8