Remove getallheader() compat shim after upstream changes to use $_SERVER.

src/third_party/lighttpd/win/php5/compat-shim.php

-<?php
-// This is a compat shim to make our php-cgi act more like apache mod_php.
-// http://www.qijoo.com/fapm/PHP/en/function.getallheaders.html
-// Well, sort of, lighttpd gives us headers like HTTP_UPPERCASE_WEE, and so
-// we do some ugly php to make that Uppercase-Wee...
-function getallheaders() {
-  foreach($_SERVER as $name => $value) {
-    if(substr($name, 0, 5) == 'HTTP_') {
-      $name = strtolower(substr($name, 5));
-      $name = join("-", array_map('ucwords', explode("_", $name)));
-      $headers[$name] = $value;
-    }
-  }
-  return $headers;
-}
-?>