Removed kAshDisableTextFilteringInOverviewMode flag.

ash/ash_switches.cc

Index: ash/ash_switches.cc
diff --git a/ash/ash_switches.cc b/ash/ash_switches.cc
index 637d7d02213b18f0c712f1b78871764ceca8a735..270a39f189f9ebf05c5b9377d19a9e2ddf116096 100644
--- a/ash/ash_switches.cc
+++ b/ash/ash_switches.cc
@@ -29,10 +29,6 @@ const char kAshCopyHostBackgroundAtBoot[] = "ash-copy-host-background-at-boot";
 // Enable keyboard shortcuts useful for debugging.
 const char kAshDebugShortcuts[] = "ash-debug-shortcuts";
 
-// Enables text filtering with the keyboard in Overview Mode.
-const char kAshDisableTextFilteringInOverviewMode[] =
-    "ash-disable-text-filtering-in-overview-mode";
-
 // Disables LockLayoutManager used for LockScreenContainer, return back to
 // WorkspaceLayoutManager.
 const char kAshDisableLockLayoutManager[] = "ash-disable-lock-layout-manager";