It was just a workaround of mutter's bug, which is already fixed, so
we can revert it.
to set the size of a frame in pixels, to maximize frames or to make them
fullscreen. To resize your initial frame pixelwise, set this option to
a non-nil value in your init file. */);
-#ifndef HAVE_PGTK
frame_resize_pixelwise = 0;
-#else
- /* https://gitlab.gnome.org/GNOME/mutter/-/issues/396 */
- frame_resize_pixelwise = true;
-#endif
DEFVAR_LISP ("frame-inhibit-implied-resize", frame_inhibit_implied_resize,
doc: /* Whether frames should be resized implicitly.