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

The issue was fixed by nodejs#43890.

Fixes: nodejs#43680
PR-URL: nodejs#44145
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
Reviewed-By: theanarkh <theratliter@gmail.com>

Author: lpinca

test/parallel/parallel.status

@@ -28,8 +28,6 @@ test-http-server-headers-timeout-keepalive: PASS,FLAKY
 test-http-server-request-timeout-keepalive: PASS,FLAKY
 # 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