tests/ip_mroute: Remove test timeouts

The configured timeout of 30s is a bit too low for a couple of tests
which create 4+ VNET jails when running tests in parallel and with
kernel sanitizers enabled.  There's no reason to have custom timeouts,
just use the default.

MFC after:	1 week

tests/sys/netinet/ip_mroute.py

@@ -192,7 +192,6 @@ def vnet_host2_handler(self, vnet):
 
     @pytest.mark.require_user("root")
     @pytest.mark.require_progs(["pimd"])
-    @pytest.mark.timeout(30)
     def test(self):
         self.starttest(["vnet_host1", "vnet_host2"])
         self.waittest()
@@ -287,7 +286,6 @@ def vnet_host4_handler(self, vnet):
 
     @pytest.mark.require_user("root")
     @pytest.mark.require_progs(["pimd"])
-    @pytest.mark.timeout(30)
     def test(self):
         self.starttest(["vnet_host1", "vnet_host2", "vnet_host3", "vnet_host4"])
         self.waittest()
@@ -347,7 +345,6 @@ def vnet_host4_handler(self, vnet):
 
     @pytest.mark.require_user("root")
     @pytest.mark.require_progs(["pimd"])
-    @pytest.mark.timeout(30)
     def test(self):
         self.starttest(["vnet_host1", "vnet_host2", "vnet_host3", "vnet_host4"])
         self.waittest()
@@ -401,7 +398,6 @@ def vnet_host2_handler(self, vnet):
         self.donetest()
 
     @pytest.mark.require_user("root")
-    @pytest.mark.timeout(30)
     def test(self):
         self.starttest(["vnet_host1", "vnet_host2"])
         self.waittest()
@@ -489,7 +485,6 @@ def vnet_host4_handler(self, vnet):
         self.donetest()
 
     @pytest.mark.require_user("root")
-    @pytest.mark.timeout(30)
     def test(self):
         self.starttest(["vnet_host1", "vnet_host2", "vnet_host3", "vnet_host4"])
         self.waittest()
@@ -549,7 +544,6 @@ def vnet_host4_handler(self, vnet):
         self.donetest()
 
     @pytest.mark.require_user("root")
-    @pytest.mark.timeout(30)
     def test(self):
         self.starttest(["vnet_host1", "vnet_host2", "vnet_host3", "vnet_host4"])
         self.waittest()