vold: remove access to /proc/net files

The auditallow added in commit
7a4af30b385d0a2a6c6093a6814492c4c18603b3 ("Start the process of locking
down proc/net", May 04 2018), has not been triggered. This is safe to
delete.

Test: Policy compiles
Test: no collected SELinux denials
Bug: 68016944
Change-Id: Ib45519b91742d09e7b93bbaf972e558848691a80
1 file changed