Curb Your Enthusiasm” will return for its 12th and final 10-episode season Feb. 4 on HBO — bringing an end to one of the 21st century’s most influential comedies that sprung from the fertile mind of creator Larry David, who also co-created “Seinfeld.”HBO has traditionally left the door open for David, 76, to continue the show at his leisure — so the news puts his personal stamp on ending one of the network’s most successful series, in which David plays an exaggerated version of himself in episodes that, for the most part, are famously improvised.“As ‘Curb’ comes to an end, I will now have the opportunity to finally shed this ‘Larry David’ persona and become the person God intended me to be — the thoughtful, kind, caring, considerate human being I was until I got derailed by portraying this malignant character,” David said in a statement, before adding a suitably wry touch.