Revert "test: mark test-vm-timeout flaky on windows"

This reverts commit f34caa9.

PR-URL: #7373
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

test/parallel/parallel.status

@@ -7,8 +7,7 @@ prefix parallel
 [true] # This section applies to all platforms
 
 [$system==win32]
-test-tick-processor : PASS,FLAKY
-test-vm-timeout     : PASS,FLAKY
+test-tick-processor     : PASS,FLAKY
 
 [$system==linux]
 test-tick-processor           : PASS,FLAKY