- enter_verification_details; text string seems to be unused now the post error doesn't use it

Signed-off-by: John Rayes <live627@gmail.com>

Themes/default/languages/Post.english.php

@@ -4,7 +4,6 @@
 global $context;
 
 $txt['post_reply'] = 'Post reply';
-$txt['enter_verification_details'] = 'Complete verification details';
 $txt['message_icon'] = 'Message icon';
 $txt['subject_not_filled'] = 'The Subject field was not filled out. It is required.';
 $txt['message_body_not_filled'] = 'The Message Body was not filled out. It is required.';