Removed img.close()

    * Wrongly passed along on the last scheduler code review. `img.close()` was moved to the camera itself

src/chimera/controllers/scheduler/handlers.py

@@ -144,10 +144,6 @@ def process(action):
             printException(e)
             raise ProgramExecutionException("Error while exposing")
 
-        # Close image files after exposing... See issue #160 for more details...
-        for img in images:
-            img.close()
-
     @staticmethod
     def abort(action):
         camera = copy.copy(ExposeHandler.camera)