shill: drop ancient flimflam profile migration

Flimflam has been dead since 2012:

https://gerrit.chromium.org/gerrit/33895

And now SELinux is blocking this anyway, as it doesn't have appropriate
policies for /var/cache/flimflam/:

https://chromium-review.googlesource.com/1414540

Rather than fix up the SELinux policies, it seems like a good time to
drop this conversion.

BUG=chromium:934410
TEST=network_ShillInitScripts

Change-Id: I254155371db47cd5fa7d4f68d805f55cbd6a539b
Reviewed-on: https://chromium-review.googlesource.com/1481104
Commit-Ready: Ben Chan <benchan@chromium.org>
Tested-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Ben Chan <benchan@chromium.org>
Reviewed-by: Kirtika Ruchandani <kirtika@chromium.org>
diff --git a/shill/init/shill-pre-start.sh b/shill/init/shill-pre-start.sh
index 2adbec6..a964a7f 100644
--- a/shill/init/shill-pre-start.sh
+++ b/shill/init/shill-pre-start.sh
@@ -37,13 +37,6 @@
 chown root:shill /proc/net/ip_conntrack
 chmod g+r /proc/net/ip_conntrack
 
-# Use flimflam's default profile if shill doesn't have one.
-if [ ! -f /var/cache/shill/default.profile -a \
-       -f /var/cache/flimflam/default.profile ]; then
-  mv /var/cache/flimflam/default.profile /var/cache/shill/default.profile
-  chmod a+r /var/cache/shill/default.profile
-fi
-
 # Create private directory for data which needs to persists across sessions.
 mkdir -p /var/lib/shill