Cleaning up unusued handlers

Test: Built and tested locally

Flag: NONE Removing unused handler references

Bug:292269949

Change-Id: I83ec8299a82ea8f3db0dace7fb3b823a703b6b62

quickstep/src/com/android/launcher3/uioverrides/QuickstepLauncher.java

@@ -200,8 +200,6 @@ import com.android.systemui.unfold.progress.RemoteUnfoldTransitionReceiver;
 import com.android.systemui.unfold.updates.RotationChangeProvider;
 import com.android.wm.shell.shared.desktopmode.DesktopModeStatus;
 
-import kotlin.Unit;
-
 import java.io.FileDescriptor;
 import java.io.PrintWriter;
 import java.util.ArrayList;
@@ -214,6 +212,8 @@ import java.util.function.BiConsumer;
 import java.util.function.Predicate;
 import java.util.stream.Stream;
 
+import kotlin.Unit;
+
 public class QuickstepLauncher extends Launcher implements RecentsViewContainer,
         SystemShortcut.BubbleActivityStarter {
     private static final boolean TRACE_LAYOUTS =
@@ -271,7 +271,7 @@ public class QuickstepLauncher extends Launcher implements RecentsViewContainer,
         RecentsView<?,?> overviewPanel = getOverviewPanel();
         SystemUiProxy systemUiProxy = SystemUiProxy.INSTANCE.get(this);
         mSplitSelectStateController =
-                new SplitSelectStateController(this, mHandler, getStateManager(),
+                new SplitSelectStateController(this, getStateManager(),
                         getDepthController(), getStatsLogManager(),
                         systemUiProxy, RecentsModel.INSTANCE.get(this),
                         () -> onStateBack());