Revert of Set proper referrer for css resource fetching

LayoutTests/http/tests/css/resources/referrer-check.php

-<?php
-
-function getReferrerPath() {
-    if (!isset($_SERVER["HTTP_REFERER"]))
-        return "";
-    $url = parse_url($_SERVER["HTTP_REFERER"]);
-    return $url['path'];
-}
-
-function putImage() {
-    $image = "../../resources/square100.png";
-    header("Content-Type: image/png");
-    header("Content-Length: " . filesize($image));
-    header("Access-Control-Allow-Origin: *");
-    ob_clean();
-    flush();
-    readfile($image);
-}
-
-function putFont() {
-    $font = "../../../../resources/Ahem.ttf";
-    header("Content-Type: font/truetype");
-    header("Content-Length: " . filesize($font));
-    header("Access-Control-Allow-Origin: *");
-    ob_clean();
-    flush();
-    readfile($font);
-}
-
-$expectedReferrerPaths = array(
-    "document" => "/css/css-resources-referrer.html",
-    "sheet" => "/css/resources/css-resources-referrer.css",
-    "importedSheet" => "/css/resources/css-resources-referrer-import.css",
-    "iframe" => "/from/iframe.html"
-);
-
-$from = $_GET["from"];
-$resource = $_GET["resource"];
-$referrerPath = getReferrerPath();
-
-if ($referrerPath === $expectedReferrerPaths[$from]) {
-    if ($resource === "image" || $resource === "image2")
-        putImage();
-    else if ($resource === "font")
-        putFont();
-    else
-        header("HTTP/1.1 500 Internal Server Error");
-} else {
-    header("HTTP/1.1 500 Internal Server Error");
-}
-
-?>