Enable T108 check for network api tests

Since the commit I3a8660838c1af2baefe21bbc57b006c9889ac35a ,
API tests of neutron advanced services have been migrated from
Tempest. So we can enable T108 check for remaining network api
tests to avoid -1 against small thing on human reviewing.

Change-Id: Ide15543c84d9b171d62db28274dbaecb4e880a6e
diff --git a/tempest/hacking/checks.py b/tempest/hacking/checks.py
index f4b76e5..77b4108 100644
--- a/tempest/hacking/checks.py
+++ b/tempest/hacking/checks.py
@@ -119,11 +119,6 @@
 
     T108
     """
-    if './tempest/api/network/' in filename:
-        # Network API tests are migrating from Tempest to Neutron repo now.
-        # So here should avoid network API tests checks.
-        return
-
     msg = "T108: hyphen should not be specified at the end of rand_name()"
     if RAND_NAME_HYPHEN_RE.match(logical_line):
         return 0, msg