Remove the editor_coordinate_hack option

I'm not sure if this would still be necessary with the new embedding
approach, but it definitely does cause more problems than it solves.

src/wine-host/editor.h

@@ -267,13 +267,6 @@ class Editor {
      */
     inline Size size() const noexcept { return wrapper_window_size_; }
 
-    /**
-     * Whether to reposition `win32_window_` to (0, 0) every time the window
-     * resizes. This can help with buggy plugins that use the (top level)
-     * window's screen coordinates when drawing their GUI.
-     */
-    const bool use_coordinate_hack_;
-
     /**
      * Whether the `editor_force_dnd` workaround for REAPER should be activated.
      * See the implementation in `editor.cpp` for more details.