Remove unused postStartTransactionCallbacks

import com.android.wm.shell.sysui.ShellInit;

import java.util.ArrayList;

import java.util.List;

import java.util.function.Consumer;

/** The default handler that handles anything not already handled. */

public class DefaultTransitionHandler implements Transitions.TransitionHandler {

            finishCallback.onTransitionFinished(null /* wct */);

        };

        final List<Consumer<SurfaceControl.Transaction>> postStartTransactionCallbacks =

                new ArrayList<>();

        @ColorInt int backgroundColorForTransition = 0;

        final int wallpaperTransit = getWallpaperTransitType(info);

        int animatingDisplayId = Integer.MIN_VALUE;

                    finishTransaction);

        }

        if (postStartTransactionCallbacks.size() > 0) {

            // postStartTransactionCallbacks require that the start transaction is already

            // applied to run otherwise they may result in flickers and UI inconsistencies.

            startTransaction.apply(true /* sync */);

            // startTransaction is empty now, so fill it with the edge-extension setup

            for (Consumer<SurfaceControl.Transaction> postStartTransactionCallback :

                    postStartTransactionCallbacks) {

                postStartTransactionCallback.accept(startTransaction);

            }

        }

        startTransaction.apply();

        // now start animations. they are started on another thread, so we have to post them