Removing unused blocks

Wow, you didn't even try a single thing before posting your question, did you? Every block has two options next to it, Region and Configure. Just change the region to or drag it to the Disabled region at the bottom.

I agree, this would be super helpful! Does anyone know how to do this?

I'd like a solution for this as well since the admin/build/block page is cluttered with blocks such as Who's Online/Who's New/Powered by Drupal etc and it takes a long time to render.

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Sounds good to me!

What a pain in the arse it is to do anything with blocks!

Takes forever to load the page! Takes more time fooling around with the blocks page then it does building the site!

Maybe its a server thing though?

*Added - one thing you can do to remove blocks is through Views. Seems anytime I created a view a block was created as well. Click on "Block" then "Remove Display"

I was wondering how to do it just like you! Then with some playing around with my site files I figured out how to do it:

1. It is pretty simple just open your site file manager, then go to the folder where your theme is - in my case it was "/htdocs/drupal/sites/all/themes/rootcandy".
2. There you will find a ".info" file, open that file and there you can see regions[block_name]=block_title list where you can delete unused blocks from!

Good Luck !

Having at least a place to tuck away unused/never will use blocks would help keep the block page organized and keep those of us who are new on the scene remain physically and mentally organized. Best would be the ability to remove these blocks altogether.

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I use "Powered Drupal" block for example:
1: use hook_block_info_alter(&$blocks)
2: set

<?php
$blocks['system']['powered-by']['status'] = 1;
?>

3: Then click "save" in list block form ... the block hides
4: FINISHED

That means: the block will be enable but its region is -1 => Don't know where to show ... :)

Copy block-admin-display-form.tpl.php from modules/blocks to your theme folder.

Add if($region!=-1): before this line: foreach ($block_listing[$region] as $delta => $data):

Of course you should add endif; afer endforeach;

Clear cache.

And thats it!

If yo want to remove only certain block you can use this preprocess function in template.php:

function YOURTHEMENAME_preprocess_block_admin_display_form(&$variables) {
unset($variables['block_listing']['-1']['system_0']);
}

(system_0 is name of Powered by Drupal block) use Devel module to find out module name

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This works the other way round, removing all modules by default and explicitly allowing them. Just add the module name to the array if it should be allowed.

/**
 * Preprocess for the block admin page, removes all unwanted blocks.
 *
 */
function theme_preprocess_block_admin_display_form(&$vars) {
  // List of modules which are allowed on the block page
  $show = array(
    'block',
    'menu',
  );
  // Scan through each block entry and remove ones that aren't needed.
  foreach ($vars['block_listing']['-1'] as $key => $disabled) {
    $type = explode('_', $key);
    if (!in_array($type[0], $show)) {
      unset($vars['block_listing']['-1'][$key]);
    }
  }
}

I copied and set up the block-admin-display-form.tpl.php like the comment above said.
Then I tried doing this in my theme's template.php:

function gcms_preprocess_block_admin_display_form(&$variables) {
	unset($variables['block_listing']['-1']['user_online']);
}

And it just hid everything in the disabled block section of the block administration page. Why is it hiding everything for me and not just the one block?

Then you won't have a messy block admin page? http://drupal.org/project/context
You will also gain some other UI benefits.

+1

I know this is a very old thread, just opening it up for those with similar scenario.

You can, for any reason, remove the blocks on the admin page only. Please do note that this does not do anything rather than remove the block delta on the block list admin page

function hook_form_block_admin_display_form_alter(&$form)
{
    $deltas = array(
        'system_management',
        'menu_devel',
        'devel_execute_php',
        'devel_switch_user',
        'menu_features',
        'locale_language_content',
        'locale_language',
        'node_recent',
        'node_syndicate',
        'shortcut_shortcuts',
        'system_help',
        'system_navigation',
        'system_powered-by',
        'system_user-menu',
        'user_login',
        'user_new',
        'user_online',
    );

    foreach ($deltas as $delta) {
        unset( $form['blocks'][$delta] );
    }
}

Where $deltas will be an array of block deltas you want to remove.

Doing this approach, the original region of a specific block will be preserved. For example, that block is assigned to the header region, then you apply this code, It will still remain on the header region, but you won't see it in the block list page.

A specific use case for this is:

• When you just want the block list admin page to be clean
• Prevent a block from changing regions (like you do not want a disabled block to be enabled). This approach still requires you to prevent user access to the block delta configuration page itself.