[Cleanup] Remove unused static methods

ash/display/screen_ash.h

Index: ash/display/screen_ash.h
diff --git a/ash/display/screen_ash.h b/ash/display/screen_ash.h
index 859cb400e00c7115240b8b04f161ca69f7e57d03..d30ad3607439500d209287879ace528ca258cfb9 100644
--- a/ash/display/screen_ash.h
+++ b/ash/display/screen_ash.h
@@ -27,39 +27,6 @@ class ASH_EXPORT ScreenAsh : public gfx::Screen {
   ScreenAsh();
   ~ScreenAsh() override;
 
-  // Finds the display that contains |point| in screeen coordinates.
-  // Returns invalid display if there is no display that can satisfy
-  // the condition.
-  static gfx::Display FindDisplayContainingPoint(const gfx::Point& point);
-
-  // Returns the bounds for maximized windows in parent coordinates.
-  // Maximized windows trigger auto-hiding the shelf.
-  static gfx::Rect GetMaximizedWindowBoundsInParent(aura::Window* window);
-
-  // Returns the display bounds in parent coordinates.
-  static gfx::Rect GetDisplayBoundsInParent(aura::Window* window);
-
-  // Returns the display's work area bounds in parent coordinates.
-  static gfx::Rect GetDisplayWorkAreaBoundsInParent(aura::Window* window);
-
-  // Converts |rect| from |window|'s coordinates to the virtual screen
-  // coordinates.
-  static gfx::Rect ConvertRectToScreen(aura::Window* window,
-                                       const gfx::Rect& rect);
-
-  // Converts |rect| from virtual screen coordinates to the |window|'s
-  // coordinates.
-  static gfx::Rect ConvertRectFromScreen(aura::Window* window,
-                                         const gfx::Rect& rect);
-
-  // Returns a gfx::Display object for secondary display. Returns
-  // invalid display if there is no secondary display connected.
-  static const gfx::Display& GetSecondaryDisplay();
-
-  // Returns a gfx::Display object for the specified id.  Returns
-  // invalid display if no such display is connected.
-  static const gfx::Display& GetDisplayForId(int64 display_id);
-
   // gfx::Screen overrides:
   gfx::Point GetCursorScreenPoint() override;
   gfx::NativeWindow GetWindowUnderCursor() override;