Minor cleanup in DashboardFragment: remove unused code

import android.util.ArrayMap;

import android.util.ArrayMap;

import android.util.ArraySet;

import android.util.ArraySet;

import android.util.Log;

import android.util.Log;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import com.android.settings.SettingsPreferenceFragment;

import com.android.settings.SettingsPreferenceFragment;

import com.android.settings.overlay.FeatureFactory;

import com.android.settings.overlay.FeatureFactory;

            new ArrayMap<>();

            new ArrayMap<>();

    private final Set<String> mDashboardTilePrefKeys = new ArraySet<>();

    private final Set<String> mDashboardTilePrefKeys = new ArraySet<>();

    protected DashboardFeatureProvider mDashboardFeatureProvider;

    private DashboardFeatureProvider mDashboardFeatureProvider;

    private DashboardTilePlaceholderPreferenceController mPlaceholderPreferenceController;

    private DashboardTilePlaceholderPreferenceController mPlaceholderPreferenceController;

    private boolean mListeningToCategoryChange;

    private boolean mListeningToCategoryChange;

    private SummaryLoader mSummaryLoader;

    private SummaryLoader mSummaryLoader;

        }

        }

    }

    }

    @Override

    public View onCreateView(LayoutInflater inflater, ViewGroup container,

            Bundle savedInstanceState) {

        final View view = super.onCreateView(inflater, container, savedInstanceState);

        return view;

    }

    @Override

    @Override

    public void onCategoriesChanged() {

    public void onCategoriesChanged() {

        final DashboardCategory category =

        final DashboardCategory category =