chore: remove desktop_screen_win.patch (#15232)

that function is never called with a null argument (all call-sites are guarded)

patches/common/chromium/.patches.yaml

@@ -100,10 +100,6 @@ patches:
   author: null
   file: compositor_delegate.patch
   description: null
--
-  author: null
-  file: desktop_screen_win.patch
-  description: null
 -
   author: Cheng Zhao <zcbenz@gmail.com>
   file: disable_hidden.patch

patches/common/chromium/desktop_screen_win.patch

@@ -1,22 +0,0 @@
-From 0dbac64c4877f7783726d3bc04f332a1491285b7 Mon Sep 17 00:00:00 2001
-From: Anonymous <anonymous@electronjs.org>
-Date: Thu, 20 Sep 2018 17:45:44 -0700
-Subject: desktop_screen_win.patch
-
-
-diff --git a/ui/views/widget/desktop_aura/desktop_screen_win.cc b/ui/views/widget/desktop_aura/desktop_screen_win.cc
-index f772f64d656e..7d13f9f81b6c 100644
---- a/ui/views/widget/desktop_aura/desktop_screen_win.cc
-+++ b/ui/views/widget/desktop_aura/desktop_screen_win.cc
-@@ -32,6 +32,8 @@ display::Display DesktopScreenWin::GetDisplayMatching(
- }
- 
- HWND DesktopScreenWin::GetHWNDFromNativeView(gfx::NativeView window) const {
-+  if (!window)
-+    return NULL;
-   aura::WindowTreeHost* host = window->GetHost();
-   return host ? host->GetAcceleratedWidget() : NULL;
- }
--- 
-2.17.0
-