Remove tui_make_visible and tui_make_invisible

Remove tui_make_visible and tui_make_invisible

tui_make_visible and tui_make_invisible are just wrappers for a method
call, so remove them and have the callers simply make the method call
themselves.

gdb/ChangeLog
2019-07-17  Tom Tromey  <tom@tromey.com>

	* tui/tui-wingeneral.h (tui_make_visible, tui_make_invisible):
	Don't declare.
	* tui/tui-wingeneral.c (tui_make_visible, tui_make_invisible):
	Remove.
	* tui/tui-win.c (tui_source_window_base::set_new_height)
	(tui_source_window_base::set_new_height)
	(make_invisible_and_set_new_height)
	(tui_source_window_base::do_make_visible_with_new_height)
	(tui_source_window_base::do_make_visible_with_new_height):
	Update.
	* tui/tui-layout.c (show_source_disasm_command, show_data)
	(show_source_or_disasm_and_command): Update.
	* tui/tui-layout.c (show_layout): Update.