WP_Screen
Class: Core class used to implement an admin screen API.
Source: wp-admin/includes/class-wp-screen.php:16
WP_Screen::remove_help_tab()
Method: Removes a help tab from the contextual help for the screen.
Source: wp-admin/includes/class-wp-screen.php:637
screen_options_show_screen
Filter Hook: Filters whether to show the Screen Options tab.
Source: wp-admin/includes/class-wp-screen.php:1029