fix slow tests

Author: Gui-FernandesBR

rocketpy/simulation/flight.py

@@ -929,8 +929,11 @@ def __check_and_handle_parachute_triggers(
             ):
                 continue  # Check next parachute
 
-            # Remove parachute from flight parachutes
-            self.parachutes.remove(parachute)
+            # Remove parachute from flight parachutes (if not already removed)
+            if parachute in self.parachutes:
+                self.parachutes.remove(parachute)
+            else:
+                continue  # Parachute already triggered, skip to next
 
             # Create phase for time after detection and before inflation
             # Must only be created if parachute has any lag