Remove unused --port flag from JavaRuntime test launcher to avoid spurious test warnings like [stderr] WARNING: Unknown command line arguments: [--port=39353]

PiperOrigin-RevId: 867270263
Change-Id: I1a15b210503beea84004081664168f7b74a10b53

Author: ludoch

runtime/test/src/test/java/com/google/apphosting/runtime/jetty9/JavaRuntimeViaHttpBase.java

@@ -300,7 +300,6 @@ public <ApiServerT extends Closeable> RuntimeContext<ApiServerT> createRuntimeCo
               .add(
                   "com.google.apphosting.runtime.JavaRuntimeMainWithDefaults",
                   "--jetty_http_port=" + jettyPort,
-                  "--port=" + apiPort,
                   "--trusted_host=" + HostAndPort.fromParts(apiHost, apiPortNum),
                   runtimeDir.getAbsolutePath())
               .addAll(config.launcherFlags())