Remove unnecessary weak pointer.

Bug: 988461
Change-Id: I2a4c6e5f64643db8349aaad4d54f15ac5961253e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1751790
Commit-Queue: Yasmin Molazadeh <yasmo@chromium.org>
Reviewed-by: Michael van Ouwerkerk <mvanouwerkerk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#686443}

chrome/browser/sharing/click_to_call/click_to_call_context_menu_observer.cc

@@ -24,8 +24,6 @@
 #include "ui/views/controls/menu/menu_config.h"
 #include "url/url_constants.h"
 
-using SharingMessage = chrome_browser_sharing::SharingMessage;
-
 ClickToCallContextMenuObserver::SubMenuDelegate::SubMenuDelegate(
     ClickToCallContextMenuObserver* parent)
     : parent_(parent) {}

chrome/browser/sharing/click_to_call/click_to_call_context_menu_observer.h

@@ -11,7 +11,6 @@
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
-#include "base/memory/weak_ptr.h"
 #include "base/optional.h"
 #include "chrome/browser/sharing/sharing_device_info.h"
 #include "components/renderer_context_menu/render_view_context_menu_observer.h"
@@ -26,9 +25,7 @@ class RenderViewContextMenuProxy;
 
 class SharingService;
 
-class ClickToCallContextMenuObserver
-    : public RenderViewContextMenuObserver,
-      public base::SupportsWeakPtr<ClickToCallContextMenuObserver> {
+class ClickToCallContextMenuObserver : public RenderViewContextMenuObserver {
  public:
   class SubMenuDelegate : public ui::SimpleMenuModel::Delegate {
    public: