remove mako specific neverallow exception

Mako is dead. Long live mako.

Bug: 21924438
Change-Id: I5413566df8f2744df7822eb1715f40958b8ad43e

domain.te

@@ -471,5 +471,4 @@ neverallow {
   -shell
   userdebug_or_eng(`-uncrypt')
   -installd
-  -surfaceflinger # TODO: see if we can remove from mako sepolicy
 } shell_data_file:lnk_file read;