Removing support for CustomContent screen

The supported way to customize Launcher and add a "-1 page" is by
using LauncherOverlays. Custom content screen is no longer supported.

Change-Id: I3f8a2734c287d1a69ae0c038ec1de1d45fa1b464
diff --git a/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java b/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java
index a0ad07a..c695758 100644
--- a/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java
+++ b/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java
@@ -411,7 +411,7 @@
         CellLayout layout = (CellLayout) workspace.getPageAt(screenIndex);
 
         boolean found = layout.findCellForSpan(outCoordinates, info.spanX, info.spanY);
-        screenIndex = workspace.hasCustomContent() ? 1 : 0;
+        screenIndex = 0;
         while (!found && screenIndex < workspaceScreens.size()) {
             screenId = workspaceScreens.get(screenIndex);
             layout = (CellLayout) workspace.getPageAt(screenIndex);