If your employer let you go early do they have to pay you for the two week notice in Nevada?

Probably not unless you have an express or implied contract with your employer. You may wish to seek the advice of an attorney as there is no specific, plain law addressing this - it is a matter of circumstance on a case-by-case basis - but most likely you are not owed anything except compensation for the hours you have actually worked. Federal and state law typically only require you to be compensated for time actually worked.