ZP Remove Customizer is a free ClassicPress & WordPress plugin that completely removes the customizer from an installation.
There is no settings page, just activate and you’re done.
Creation of this plugin was inspired by the WordPress plugin “Customizer Remove All Parts” which was permanently removed from the WordPress plugin repository, however it has been coded from scratch to our own coding standards.
ZP Remove Customizer is a dual-platform plugin and works with ClassicPress (1.1 onwards), and WordPress (4.9 onwards).
The download link on the right is a direct link to the zip of the current release. To install the plugin, download this zip then go to the admin plugins page, click the ‘Add New’ button, then click the ‘Upload Plugin’ button and upload the zip file.
Though this plugin is not in the WordPress plugin repository, future updates will be shown on the admin plugins page when available. The plugin must be active in order to check for updates.