Tips on Customizing Remote Jobs

How to Hide Remote Jobs Admin Menus

function plt_hide_remote_jobs_menus() {
	//Hide "Jobs".
	remove_menu_page('edit.php?post_type=remjobs_jobs');
	//Hide "Jobs → All Jobs".
	remove_submenu_page('edit.php?post_type=remjobs_jobs', 'edit.php?post_type=remjobs_jobs');
	//Hide "Jobs → Add New Job".
	remove_submenu_page('edit.php?post_type=remjobs_jobs', 'post-new.php?post_type=remjobs_jobs');
	//Hide "Jobs → Categories".
	remove_submenu_page('edit.php?post_type=remjobs_jobs', 'edit-tags.php?taxonomy=remjobs_job_category&post_type=remjobs_jobs');
	//Hide "Jobs → Skills".
	remove_submenu_page('edit.php?post_type=remjobs_jobs', 'edit-tags.php?taxonomy=remjobs_job_skills&post_type=remjobs_jobs');
	//Hide "Jobs → Locations".
	remove_submenu_page('edit.php?post_type=remjobs_jobs', 'edit-tags.php?taxonomy=remjobs_job_location&post_type=remjobs_jobs');
	//Hide "Jobs → Employment Types".
	remove_submenu_page('edit.php?post_type=remjobs_jobs', 'edit-tags.php?taxonomy=remjobs_job_employment_type&post_type=remjobs_jobs');
	//Hide "Jobs → Benefits".
	remove_submenu_page('edit.php?post_type=remjobs_jobs', 'edit-tags.php?taxonomy=remjobs_job_benefits&post_type=remjobs_jobs');
	//Hide "Jobs → Salary Ranges".
	remove_submenu_page('edit.php?post_type=remjobs_jobs', 'edit-tags.php?taxonomy=remjobs_job_salary_range&post_type=remjobs_jobs');
}

add_action('admin_menu', 'plt_hide_remote_jobs_menus', 15);

Where do I put this code?

How to Hide the "Job Details" Meta Box

function plt_hide_remote_jobs_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Job Details" meta box.
	remove_meta_box('remjobs_details', $screen->id, 'normal');
}

add_action('add_meta_boxes', 'plt_hide_remote_jobs_metaboxes', 20);