Remove link of url preview from activity

functions.php

<?php
// Add this function to theme's functions.php
// Check if function doest not exists.
if ( ! function_exists( 'rtmedia_wp_footer_add_js_remove_link' ) ) {
	/**
	 * Remove link from activity url preview content.
	 */
	function rtmedia_wp_footer_add_js_remove_link() {
		?>
		<script type="text/javascript">
			jQuery( function($) {
				function remove_site_url() {
					jQuery( '.rtmp_link_preview_container' ).each(function(e) {
					    var previewurl = jQuery(this).children('a').attr('href');
						jQuery(this).parent('.rtmp_final_link').siblings('p').find('a').each(function(e) {
							var otherurl = jQuery(this).attr('href');
							if ( previewurl==otherurl ){
								jQuery(this).hide();
							}
							jQuery( '.activity-inner' ).show();
						});
					});
				}

				remove_site_url();

				// Remove target blank when new elements are added
				jQuery( '#activity-stream' ).bind( "DOMSubtreeModified", function() {
					remove_site_url();
				});

	        });
		</script>
		<?php
	}
}
add_action( 'wp_footer', 'rtmedia_wp_footer_add_js_remove_link' );

?>

// Add this to custom css ( rtMedia->settings->Custom CSS )

#activity-stream .activity-inner {
      display: none;
}