don't shut down pool from the callback

Author: Simn

src/hxcoro/CoroRun.hx

@@ -137,7 +137,6 @@ class CoroRun {
 			if (scheduler.now() - start > 10000) {
 				scope.dump();
 				pool.dump();
-				pool.shutdown();
 				throw "Inactivity shutdown";
 			}
 		}