The LEOS atexit logic is no longer necessary (and didn't work anymore)

since I moved the LEOS::shutdown() command into the LEOS_bundle
destructor.  Good catch by Landon.

Author: jmikeowen

src/SimulationControl/Spheral.py

@@ -130,14 +130,6 @@
 # ------------------------------------------------------------------------------
 # EasyProfilerStart()
 
-# ------------------------------------------------------------------------------
-# Stuff to do on exit
-# ------------------------------------------------------------------------------
-try:
-    atexit.register(LEOS_bundle.finalize)
-except:
-    pass
-
 # ------------------------------------------------------------------------------
 # Output some useful Spheral configuration info to stdout
 # ------------------------------------------------------------------------------