test: remove test-net-write-fully-async-hex-string flaky designation

The original issue is likely the same as other tests that time out.

Refs: nodejs#54918
Refs: nodejs@84c2e712ebcd0f32dc0e
RefS: nodejs#52959

Author: lpinca

test/parallel/parallel.status

@@ -6,8 +6,6 @@ prefix parallel
 
 [true] # This section applies to all platforms
 # https://github.com/nodejs/node/issues/52273
-test-net-write-fully-async-hex-string: PASS, FLAKY
-# https://github.com/nodejs/node/issues/52273
 test-shadow-realm-gc: SKIP
 test-shadow-realm-gc-module: SKIP
 # https://github.com/nodejs/node/issues/52274