misc: delete CODEOWNERS now that we have a review rotation
misc: delete CODEOWNERS now that we have a review rotation


umaar/lighthouse,ev1stensberg/lighthouse,umaar/lighthouse,umaar/lighthouse,GoogleChrome/lighthouse,ev1stensberg/lighthouse,GoogleChrome/lighthouse,GoogleChrome/lighthouse,ev1stensberg/lighthouse,ev1stensberg/lighthouse,umaar/lighthouse,GoogleChrome/lighthouse,GoogleChrome/lighthouse