Delete Unused Flag related to Altering how the workspace is loaded.

This flagged feature was never released, and instead was thought to be too
complicated compared to the benefits in decreased latency.

Bug: 251502424
Test: Verified that this launcher still loads properly when this flag is removed.
Flag: EXEMPT flag removal
Change-Id: I672708e26cb37d1e2b22c4510f9c3500edd4f959
diff --git a/src/com/android/launcher3/LauncherModel.kt b/src/com/android/launcher3/LauncherModel.kt
index a013eaa..85ecd58 100644
--- a/src/com/android/launcher3/LauncherModel.kt
+++ b/src/com/android/launcher3/LauncherModel.kt
@@ -25,7 +25,6 @@
 import android.util.Pair
 import androidx.annotation.WorkerThread
 import com.android.launcher3.celllayout.CellPosMapper
-import com.android.launcher3.config.FeatureFlags
 import com.android.launcher3.icons.IconCache
 import com.android.launcher3.model.AddWorkspaceItemsTask
 import com.android.launcher3.model.AllAppsList
@@ -67,8 +66,8 @@
     private val context: Context,
     private val mApp: LauncherAppState,
     private val iconCache: IconCache,
-    private val appFilter: AppFilter,
-    private val mPmHelper: PackageManagerHelper,
+    appFilter: AppFilter,
+    mPmHelper: PackageManagerHelper,
     isPrimaryInstance: Boolean,
 ) {
 
@@ -304,9 +303,6 @@
                     launcherBinder.bindAllApps()
                     launcherBinder.bindDeepShortcuts()
                     launcherBinder.bindWidgets()
-                    if (FeatureFlags.CHANGE_MODEL_DELEGATE_LOADING_ORDER.get()) {
-                        this.modelDelegate.bindAllModelExtras(callbacksList)
-                    }
                     return true
                 } else {
                     mLoaderTask =