CMakeFindBinUtils: Remove unnecessary variable unset calls
Some unset calls were added by !3527 (merged) but they are unnecessary since !3584 (merged) added a loop to do the unset calls.
Suggested-by: @Lange
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Some unset calls were added by !3527 (merged) but they are unnecessary since !3584 (merged) added a loop to do the unset calls.
Suggested-by: @Lange