How to remove "FILE NAME SUGGESTION" from rendered HTML

Question

I'm using D7.

I want to remove "FILE NAME SUGGESTION"(please refer to the uploaded image) from pages.

Honestly, I have no idea why it is displayed nor when it was enabled...

So, I searched the ways to enable that IN ORDER TO DISABLE NOW. I found there are three possible ways to enable it (Sorry if those ways are wrong because of my mis-understanding English):

1. Make $conf['theme_debug'] = TRUE; in settings.php

2. Implement function like

   function mytheme_preprocess_page(&$vars, $hook) {
     if (isset($vars['node']->type)) {
       $vars['theme_hook_suggestions'][] = 'page__' . $vars['node']->type;
     }
   }
   

3. Use Theme developer module

About 1, I checked settings.php and found $conf['theme_debug'] = TRUE; comment out in that.

About 2, I checked my template.php and found I coded the function mytheme_preprocess_page(&$vars, $hook) {...}. So, I removed it.

About 3, I installed Theme developer module but it made all pages blank white pages. So I manually updated the module's status from 1 to 0 of the module on system table on the database, and uninstalled.

So, now I don't know why it still output "FILE NAME SUGGESTION". Does anybody have any idea why?

Answer 1

I found the reason why "FILE NAME SUGGESTION" was still output. It is because a following code still remained in template.php in Zen(not sub theme).

$GLOBALS['conf']['theme_debug'] = TRUE;

I didn't coded it by myself. So, I guess the code was added when I install some module(probably Theme developer?).

Anyways, when I comment out it, "FILE NAME SUGGESTION" disappered.