Wordpress - Hide "Add media", HTML editor from TinyMCE

It should be 'media_buttons' => FALSE.

array (
    'textarea_rows' => 5,
    'media_buttons' => FALSE,
    'teeny'         => TRUE,
    'tinymce'       => TRUE
)

… creates this editor:

enter image description here

If you want to hide/disable/prevent/remove the "Add Media"-button in 2018 you can do the following (in essence):

// probably in your functions.php
remove_action('media_buttons', 'media_buttons');

In WordPress ver 4.9 it does not seem media buttons can be turned off using the 'tiny_mce_before_init' hook.

Instead I was able to remove this using 'wp_editor_settings', like so:

add_filter( 'wp_editor_settings', function($settings) {
  $settings['media_buttons']=FALSE;
  return $settings;
});

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