Remove notebooks from GHA checks

Author: kushalbakshi

.github/workflows/test.yaml

@@ -32,5 +32,4 @@ jobs:
       - name: Run style tests
         run: |
           python_version=${{matrix.py_ver}}
-          black element_interface --check --verbose --target-version py${python_version//.}
-          black notebooks --check --verbose --target-version py${python_version//.}
+          black element_interface --check --verbose --target-version py${python_version//.}