No matter how much you guys say "I just want TR to leave", they won't ever leave. The day TR's story is over is the day the final episode of the anime ends.
TRio have appeared in more episodes than any other character of Pokemon besides Ash and Pikachu. They've been with Ash and Pikachu longer than Brock and Misty. Jessie, James, and Meowth are like older siblings to Ash and Pikachu. Even though they obviously hate each other, they've pushed their differences aside to help each other when they're in a time of need.
Saying you want the TRio to leave is basically saying you want Ash and Pikachu to leave, and even though some of you do, you gotta realize its just not happening.