No, the vast majority of templates are licensed under a Creative Commons, GPL or similar, removing the credits would be illegal. You can simplify the credits or relocate, but not remove them.
Templates are free, so keep the credits is a way to thank those who designed or adapt the template.
/rating_on.png "4 votes, average: 5.00 out of 5")
/rating_half.png "5 votes, average: 4.60 out of 5")
(4.60 out of 5)