Literal translations:
* Le temps n'a pas de sens. (This is the most direct translation.)
* Le temps est sans signification. (This emphasizes the lack of significance.)
More nuanced expressions:
* Le temps est relatif. (This emphasizes the relativity of time, implying that it can be subjective and fluid.)
* Le temps n'a aucun poids. (This emphasizes the lack of weight or importance of time.)
* Le temps est un concept abstrait. (This emphasizes the abstract nature of time, suggesting it is not a tangible thing.)
The best translation depends on the context and the specific meaning you want to convey.