Remove support for traceparent (#994)

Author: cleptric

src/Sentry/Laravel/Features/HttpClientIntegration.php

@@ -18,7 +18,6 @@
 use Sentry\Tracing\SpanStatus;
 use function Sentry\getBaggage;
 use function Sentry\getTraceparent;
-use function Sentry\getW3CTraceparent;
 
 class HttpClientIntegration extends Feature
 {
@@ -56,8 +55,7 @@ public function attachTracingHeadersToRequest(RequestInterface $request)
         if ($this->shouldAttachTracingHeaders($request)) {
             return $request
                 ->withHeader('baggage', getBaggage())
-                ->withHeader('sentry-trace', getTraceparent())
-                ->withHeader('traceparent', getW3CTraceparent());
+                ->withHeader('sentry-trace', getTraceparent());
         }
 
         return $request;

src/Sentry/Laravel/Features/QueueIntegration.php

@@ -80,7 +80,6 @@ public function onBoot(Dispatcher $events): void
 
                 if ($payload !== null) {
                     $payload[self::QUEUE_PAYLOAD_BAGGAGE_DATA] = getBaggage();
-                    $payload[self::QUEUE_PAYLOAD_TRACE_PARENT_DATA] = getTraceparent();
                     $payload[self::QUEUE_PAYLOAD_PUBLISH_TIME] = microtime(true);
                 }
 

src/Sentry/Laravel/Integration.php

@@ -194,11 +194,12 @@ public static function sentryTracingMeta(): string
     /**
      * Retrieve the `traceparent` meta tag with tracing information to link this request to front-end requests.
      *
+     * @deprecated since version 4.14. To be removed in version 5.0.
      * @return string
      */
     public static function sentryW3CTracingMeta(): string
     {
-        return sprintf('<meta name="traceparent" content="%s"/>', getW3CTraceparent());
+        return '';
     }
 
     /**

src/Sentry/Laravel/Tracing/Middleware.php

@@ -151,7 +151,7 @@ private function startTransaction(Request $request, HubInterface $sentry): void
         );
 
         $context = continueTrace(
-            $request->header('sentry-trace') ?? $request->header('traceparent', ''),
+            $request->header('sentry-trace', ''),
             $request->header('baggage', '')
         );