Revert "Blacklist 137-cfi on target 32."

This reverts commit 51e957ce2c1c3e906ced8d0986baa76d93a6adca.

Reason for revert: The failing test has been fixed.

Bug: 147910661
Change-Id: I292cc8da3b247aa09d6cda3c160700a685c2e5b7
diff --git a/test/knownfailures.json b/test/knownfailures.json
index 0eb3952..80904db 100644
--- a/test/knownfailures.json
+++ b/test/knownfailures.json
@@ -96,12 +96,6 @@
                         "slowness of gcstress makes this bad."]
     },
     {
-        "tests": "137-cfi",
-        "variant": "target & 32",
-        "description": ["Flakes in unwinding on armv7."],
-        "bug": "b/147910661"
-    },
-    {
         "tests": "152-dead-large-object",
         "variant": "gcstress",
         "description": ["152-dead-large-object requires a heap larger than what gcstress uses."],