Do not try deleting the old xenguest log file.
Do not try deleting the old xenguest log file.

The only time where this will succeed is when performing localhost
migrations.  This action is a deliberate choice on behalf of the user,
suggesting that they are also likely to want the log files.

Specifically, in the case of a localhost migrate, the logs for the transmit
half of the migrate are deleted.

Signed-off-by: Andrew Cooper <cb880bd9232cc23a76ddb35f95d96ed0ad981f23@citrix.com>

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