Remove the use of dbus from comments and policy from unix tests

Note one use of dbus is left because it is represnative of a unix
socket name used for communication with dbus

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Christian Boltz <apparmor@cboltz.de>

parser/tst/simple_tests/unix/bad_bind_2.sd

@@ -1,5 +1,5 @@
 #
-#=DESCRIPTION dbus bind with non-bind interface modifier
+#=DESCRIPTION unix bind with non-bind interface modifier
 #=EXRESULT FAIL
 #
 

parser/tst/simple_tests/unix/bad_regex_03.sd

@@ -4,5 +4,5 @@
 #
 
 profile foo {
-  dbus send peer=(label=spla{t,r ),
+  unix send peer=(label=spla{t,r ),
 }