test: remove test-http-client-response-timeout flaky designation

The issue was fixed by nodejs/node#43890.

Fixes: nodejs/node#43680
PR-URL: nodejs/node#44145
Reviewed-By: Santiago Gimeno <[email protected]>
Reviewed-By: theanarkh <[email protected]>

Author: lpinca

test/parallel/parallel.status

@@ -25,8 +25,6 @@ test-domain-error-types: PASS,FLAKY
 [$system==macos]
 # https://github.com/nodejs/node/issues/43465
 test-http-server-request-timeouts-mixed: PASS,FLAKY
-# https://github.com/nodejs/node/issues/43680
-test-http-client-response-timeout: PASS,FLAKY
 
 [$arch==arm || $arch==arm64]
 # https://github.com/nodejs/node/pull/31178