Revert "Disable a test to unblock CI"

This reverts commit 29a6d10.

Author: DougGregor

test/stdlib/BridgeIdAsAny.swift.gyb

@@ -175,10 +175,7 @@ protocol P {}
 %{
 testCases = [
   # testName                     type                               valueExpr                      testFunc                                     conformsToError  conformsToHashable
-
-  # disabled to unblock CI: rdar://problem/57393991
-  #  ("classes",                    "LifetimeTracked",                 "LifetimeTracked(0)",          "bridgedObjectPreservesIdentity",            True,            True),
-
+  ("classes",                    "LifetimeTracked",                 "LifetimeTracked(0)",          "bridgedObjectPreservesIdentity",            True,            True),
   ("strings",                    "String",                          '"vitameatavegamin"',          "stringBridgesToEqualNSString",              True,            True),
   ("unbridged type",             "KnownUnbridged",                  "KnownUnbridged()",            "boxedTypeRoundTripsThroughDynamicCasting",  False,           True),
   ("tuple",                      "(Int, String)",                   '(1, "2")',                    "tupleCanBeDynamicallyCast",                 False,           False),