Revert "Testsuite: hpc_fork is failing for some ways"

This reverts commit 17c3771e.

As noted in GHC #11643, this is now fixed.

tests/fork/test.T

@@ -2,12 +2,6 @@ setTestOpts([omit_ways(['ghci','threaded2']), when(fast(), skip)])
 
 hpc_prefix = "perl ../hpcrun.pl --clear --exeext={exeext} --hpc={hpc}"
 
-failing_ways_for_11645 = \
-    [w for w in prof_ways if w not in threaded_ways and w in opt_ways]
-
-# Skip on Windows, no forkProcess.
-test('hpc_fork',
-     [when(opsys('mingw32'), skip), cmd_prefix(hpc_prefix),
-      expect_broken_for(11645, failing_ways_for_11645)],
-     compile_and_run, ['-fhpc'])
+test('hpc_fork', [ when(opsys('mingw32'), skip), # no forkProcess on Windows
+                   cmd_prefix(hpc_prefix) ], compile_and_run, ['-fhpc'])