Revert "test: mark test-http-regr-gh-2928 as flaky"

This reverts commit 48fcb20.

Refs: nodejs/node@18e00a577d74
PR-URL: nodejs/node#49708
Reviewed-By: Joyee Cheung <[email protected]>
Reviewed-By: Franziska Hinkelmann <[email protected]>

Author: sercher

graal-nodejs/test/sequential/sequential.status

@@ -54,10 +54,6 @@ test-worker-fshandles-open-close-on-termination: SKIP
 # https://github.com/nodejs/node/issues/47116
 test-http-max-sockets: PASS, FLAKY
 
-[$system==win32 || $system==freebsd]
-# https://github.com/nodejs/node/issues/49564
-test-http-regr-gh-2928: PASS, FLAKY
-
 [$system==linux]
 
 [$system==macos]