Revert "📈 Add GlitchTip"

This reverts commit d5679a626d.

vendor/php-http/client-common/src/Plugin/HeaderSetPlugin.php

@@ -1,44 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Http\Client\Common\Plugin;
-
-use Http\Client\Common\Plugin;
-use Http\Promise\Promise;
-use Psr\Http\Message\RequestInterface;
-
-/**
- * Set headers on the request.
- *
- * If the header does not exist it wil be set, if the header already exists it will be replaced.
- *
- * @author Soufiane Ghzal <sghzal@gmail.com>
- */
-final class HeaderSetPlugin implements Plugin
-{
-    /**
-     * @var array
-     */
-    private $headers;
-
-    /**
-     * @param array $headers Hashmap of header name to header value
-     */
-    public function __construct(array $headers)
-    {
-        $this->headers = $headers;
-    }
-
-    /**
-     * {@inheritdoc}
-     */
-    public function handleRequest(RequestInterface $request, callable $next, callable $first): Promise
-    {
-        foreach ($this->headers as $header => $headerValue) {
-            $request = $request->withHeader($header, $headerValue);
-        }
-
-        return $next($request);
-    }
-}