**Apache Airflow version**:
2.0.2

**Kubernetes version (if you are using kubernetes)** (use `kubectl version`):
v1.18.18

**Environment**:
Cloud provider or hardware configuration: AWS


**What happened**:

Updated to Airflow 2.0.2 and a new warning appeared in webserver logs:
```
WARNING - Exception when importing 'airflow.providers.google.common.hooks.leveldb.LevelDBHook' from 'apache-airflow-providers-google' package: No module named 'airflow.providers.google.common.hooks.leveldb'
```

**What you expected to happen**:
No warning.

**How to reproduce it**:
Don't know the specific details. Have tried adding `pip install --upgrade apache-airflow-providers-google` but the error was still there.

**Anything else we need to know**:
I am not using LevelDB for anything in my code, as a result I don't understand from where this error is coming.
tests/core/test_providers_manager.py
def test_providers_are_loaded(self):
        provider_manager = ProvidersManager()
        provider_list = list(provider_manager.providers.keys())
        
        for provider in provider_list:
            package_name = provider_manager.providers[provider][1]['package-name']
            version = provider_manager.providers[provider][0]
            assert re.search(r'[0-9]*\.[0-9]*\.[0-9]*.*', version)
            assert package_name == provider
        assert ALL_PROVIDERS == provider_list
    def test_hooks(self):
        provider_manager = ProvidersManager()
        connections_list = list(provider_manager.hooks.keys())
        assert CONNECTIONS_LIST == connections_list
    def test_connection_form_widgets(self):
        provider_manager = ProvidersManager()
        connections_form_widgets = list(provider_manager.connection_form_widgets.keys())
        assert CONNECTION_FORM_WIDGETS == connections_form_widgets
    def test_field_behaviours(self):
        provider_manager = ProvidersManager()
        connections_with_field_behaviours = list(provider_manager.field_behaviours.keys())
        assert CONNECTIONS_WITH_FIELD_BEHAVIOURS == connections_with_field_behaviours
    def test_extra_links(self):
        provider_manager = ProvidersManager()
        extra_link_class_names = list(provider_manager.extra_links_class_names)
        assert EXTRA_LINKS == extra_link_class_names