Remove shiro.ini conversion script

Remove shiro.ini conversion script

shiro.ini was done away with many releases ago.  As part
of its removal, the AAA team added a conversion script to
convert the shiro.ini file into a format that could be
recognized by the aaa clustered-app-config.  Since the
shiro.ini based approach has been gone for over a release,
this patch removes the conversion script since it should
no longer be needed.

Change-Id: I6866ae1faea0362251ff26fabc8f6df360acde08
Signed-off-by: Ryan Goulding <ryandgoulding@gmail.com>