Remove incorrect and poorly tested code for trying to reason about values on default edges of switches.  Just return the conservatively correct answer.
Remove incorrect and poorly tested code for trying to reason about values on default edges of
switches.  Just return the conservatively correct answer.


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@112876 91177308-0d34-0410-b5e6-96231b3b80d8

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