(w32_display_info_for_display): Remove unused function.

(w32_display_info_for_display): Remove unused function.
(w32_draw_bitmap): Use pre-built bitmaps.
(w32_initialize_display_info): New function to initialize parts of
display info that are common to both GUI and console frames.
(w32_term_init): Use w32_initialize_display_info. Do not set
Vw32_num_mouse_buttons here, as it is not called for console
frames.  Build bitmaps for indicating truncated lines etc.
(x_delete_display): Destroy pre-built bitmaps.