Remove useless double quotes around flake8 additional dependencies

.pre-commit-config.yaml

@@ -17,10 +17,10 @@ repos:
     hooks:
       - id: flake8
         additional_dependencies:
-          - "flake8-coding==1.3.2"
-          - "flake8-copyright==0.2.4"
-          - "flake8-debugger==4.1.2"
-          - "flake8-mypy==17.8.0"
+          - flake8-coding==1.3.2
+          - flake8-copyright==0.2.4
+          - flake8-debugger==4.1.2
+          - flake8-mypy==17.8.0
   - repo: https://github.com/pycqa/pydocstyle
     rev: 6.3.0
     hooks: