remove deprecated comments

Author: sannant

run-mpitests.py

@@ -1,6 +1,3 @@
-# pop the current directory from search path
-# python interpreter adds this to a top level script
-# but we will likely have a name conflict (runtests.py .vs runtests package)
 import sys;
 from runtests.mpi import Tester
 

run-tests.py

@@ -1,6 +1,3 @@
-# pop the current directory from search path
-# python interpreter adds this to a top level script
-# but we will likely have a name conflict (runtests.py .vs runtests package)
 import sys;
 from runtests import Tester
 import os.path