How to remove images from showing in a post with the_content()?

Try removing (image), like this:

<?php 
$content = get_the_content();
$content = preg_replace("/<img[^>]+\>/i", " ", $content);          
$content = apply_filters('the_content', $content);
$content = str_replace(']]>', ']]>', $content);
echo $content;
?>