Revert "Handle ChromeVox Search + Space to "press" holding space items."

This reverts commit bbf55256.

Reason for revert: Better fix in:
https://chromium-review.googlesource.com/c/chromium/src/+/2468338

Original change's description:
> Handle ChromeVox Search + Space to "press" holding space items.
>
> Search + Space propagates to the view as mouse events. Unfortunately we
> can't tell from the mouse event if the event was created by ChromeVox
> but its good enough to just check if ChromeVox is enabled.
>
> Bug: 1137039
> Change-Id: I0ed18774632b0e46bf6100d86a27abbf5df29f85
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2466165
> Reviewed-by: Ahmed Mehfooz <amehfooz@chromium.org>
> Commit-Queue: David Black <dmblack@google.com>
> Cr-Commit-Position: refs/heads/master@{#816340}

TBR=dmblack@google.com,amehfooz@chromium.org

Change-Id: Ic438b2da85cceb76d66521e11c5520787e456dee
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1137039
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2468339Reviewed-by: David Black <dmblack@google.com>
Commit-Queue: David Black <dmblack@google.com>
Cr-Commit-Position: refs/heads/master@{#816622}

ash/system/holding_space/holding_space_item_view_delegate.cc

@@ -4,7 +4,6 @@
 
 #include "ash/system/holding_space/holding_space_item_view_delegate.h"
 
-#include "ash/accessibility/accessibility_controller_impl.h"
 #include "ash/public/cpp/holding_space/holding_space_client.h"
 #include "ash/public/cpp/holding_space/holding_space_constants.h"
 #include "ash/public/cpp/holding_space/holding_space_controller.h"
@@ -12,7 +11,6 @@
 #include "ash/public/cpp/holding_space/holding_space_metrics.h"
 #include "ash/public/cpp/holding_space/holding_space_model.h"
 #include "ash/resources/vector_icons/vector_icons.h"
-#include "ash/shell.h"
 #include "ash/strings/grit/ash_strings.h"
 #include "ash/system/holding_space/holding_space_item_view.h"
 #include "base/bind.h"
@@ -109,19 +107,6 @@ bool HoldingSpaceItemViewDelegate::OnHoldingSpaceItemViewMousePressed(
   // clear any view that we had cached to ignore mouse released events for.
   ignore_mouse_released_ = nullptr;
 
-  // If ChromeVox is enabled, we assume this mouse `event` to be a result of
-  // having pressed Search + Space. In this case, we'll open the selected
-  // holding space items. If the "pressed" `view` is not part of the current
-  // selection it will become the entire selection.
-  const bool spoken_feedback_enabled =
-      Shell::Get()->accessibility_controller()->spoken_feedback().enabled();
-  if (spoken_feedback_enabled) {
-    if (!view->selected())
-      SetSelection(view);
-    OpenItems(GetSelection());
-    return true;
-  }
-
   // If the `view` is already selected, mouse press is a no-op. Actions taken on
   // selected views are performed on mouse released in order to give drag/drop
   // a chance to take effect (assuming that drag thresholds are met).