Removing delete permanently button in uploading files media

This might do the trick!

css:

.media-sidebar .details .edit-attachment {
    display: none;
}
.media-sidebar .details .delete-attachment {
    display: none;
}

And this:

foreach( array( 'post.php', 'post-new.php' ) as $hook )
    add_action( "admin_print_styles-$hook", 'admin_styles_so_25894288');

function admin_styles_so_25894288() {
    global $typenow;
    if( 'post' !== $typenow )
        return;
    ?>
    <style>
        .media-sidebar .details .delete-attachment
        { 
            display: block; 
        }
        .media-sidebar .details .edit-attachment
        { 
            display: block; 
        }
    </style>
    <?php

}