test: unmark test-cpu-prof-dir-worker as flaky

The test could finish its workload without recording a workload frame.
0ab4a1c increased the non-Windows workload from fib(30) to fib(40),
and 92e6342 moved Profiler.setSamplingInterval before Profiler.start
so the requested interval takes effect.

Remove the flaky expectation left over from before those fixes.

Refs: #27611
Refs: #32168
Signed-off-by: Filip Skokan <panva.ip@gmail.com>
Assisted-by: Claude, Codex
PR-URL: #66319
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: panva

test/sequential/sequential.status

@@ -5,8 +5,6 @@ prefix sequential
 # sample-test                       : PASS,FLAKY
 
 [true] # This section applies to all platforms
-# https://github.com/nodejs/node/issues/27611#issuecomment-613100468
-test-cpu-prof-dir-worker: PASS, FLAKY
 # https://github.com/nodejs/node/issues/47409
 test-http2-large-file: PASS, FLAKY