Revert "Add useSystemProvidedLauncherForSecondary config"

This reverts commit 4626518fcd65b8b0698e45c1faca4d3e77d0cef3.

Reason for revert: Broke RootActivityContainerTests.testStartHomeOnAllDisplays

Bug: 131112301
Change-Id: I87b574ff4d289d159aeea4312dc0ad0c64b414ac
diff --git a/services/core/java/com/android/server/wm/ActivityTaskManagerService.java b/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
index 0ae1ff5..ee6cf54 100644
--- a/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
+++ b/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
@@ -5798,10 +5798,8 @@
      */
     Intent getSecondaryHomeIntent(String preferredPackage) {
         final Intent intent = new Intent(mTopAction, mTopData != null ? Uri.parse(mTopData) : null);
-        final boolean useSystemProvidedLauncher = mContext.getResources().getBoolean(
-                com.android.internal.R.bool.config_useSystemProvidedLauncherForSecondary);
-        if (preferredPackage == null || useSystemProvidedLauncher) {
-            // Using the component stored in config if no package name or forced.
+        if (preferredPackage == null) {
+            // Using the component stored in config if no package name.
             final String secondaryHomeComponent = mContext.getResources().getString(
                     com.android.internal.R.string.config_secondaryHomeComponent);
             intent.setComponent(ComponentName.unflattenFromString(secondaryHomeComponent));