Remove duplicate neverallow rule.

Commit: 7ffb9972076bfbd2abab1df6b4d759d14d55af96 added protection against low
memory mapping for all domains, a superset of appdomain.  Remove the same,
redundant neverallow rule from appdomain.

Change-Id: Ia41c02763f6b5a260c56d10adfbab649d9f3f97c
1 file changed