pes

Commit 1b9f644dfeb638e0146ce54f4e48c87a2841a603 already got rid of
StringCopy and StringCmp, so remove the left over prototypes.

Signed-off-by: Davidlohr Bueso <dave@gnu.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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