Remove duplicate C# comment from GDscript codeblock

getting_started/first_3d_game/06.jump_and_squash.rst

@@ -237,7 +237,6 @@ With this code, if no collisions occurred on a given frame, the loop won't run.
         #...
 
         # Iterate through all collisions that occurred this frame
-        # in C this would be for(int i = 0; i < collisions.Count; i++)
         for index in range(get_slide_collision_count()):
             # We get one of the collisions with the player
             var collision = get_slide_collision(index)