AIOSEOP meta box appears when SEO for post types is disabled

[wpsmort]

If you uncheck all post type and taxonomy boxes under Custom Post Type Settings and then disable SEO for Custom Post Types then the AIOSEOP meta box is still output on the Edit Post screen.

This has been a bug for a while now.

Steps to reproduce this:

1. Go to General Settings > Custom Post Type Settings and uncheck all checkboxes and disable Advanced Options then click Update Options
2. Go back to Custom Post Type Settings and set SEO for Custom Post Types to Disabled
3. Edit any post or page and you should see the AIOSEOP meta box

This problem should go away when we remove the SEO for Custom Post Types option - Issue #68

[arnaudbroes]

@wpsmort
I've tested this with two different, fresh local test sites and a few versions of WordPress (ranging from 4.8.1 to 4.0) and All in One SEO Pack (ranging from 2.4.15.3 (PRO) to 2.0.0 (FREE)) and it seems that this issue has been there since the start with 2.0.0 in both versions.

[contactashish13]

@wpsmort @arnaudbroes PR: #1380

[arnaudbroes]

@michaeltorbert I tested this. Needs code review.