Wordpress , by default, displays the version you are using your blog in the source code within a goal tag with the following:
The problem with this is that this information can be used with bad intentions, especially if they do not always have the latest version installed, which by the way, it is increasingly tedious to do with the number of versions and subversion post. So, for completely eliminate
this information must be made two easy steps:
1. Remove the version on the theme .
Most of the items bring the function that adds the version of Wordpress, to eliminate it, go to File header.php and look as follows:
" />
Not in all matters, but so we find it, maybe your item not included by default.
2. Action without leaving the function that writes the version .
Previously the code from Step 1 to eliminate the target tag with information from the generator, but the Wordpress recently realized how easy it was to do it and hid a little more in the
core system.
Then, find the functions.php in the folder of your theme (you may be right before:
?> the end of the file) and put the following:
Remove
// version of WP
remove_action ( 'wp_head', 'wp_generator');
Conclusion
It is understandable that in Wordpress want to have statistics on the use of CMS, but if this opens up a potential vulnerability, seeking a different, more discreet.
Source: Support wordpress

<><><>