removed span method from html class.

system/html.php

@@ -36,18 +36,6 @@ class HTML {
 	}
 
 	/**
-	 * Generate an HTML span tag.
-	 *
-	 * @param  string  $value
-	 * @param  array   $attributes
-	 * @return string
-	 */
-	public static function span($value, $attributes = array())
-	{
-		return '<span'.static::attributes($attributes).'>'.static::entities($value).'</span>';
-	}
-
-	/**
 	 * Generate a HTML link.
 	 *
 	 * @param  string  $url