riotctrl_shell.cord_ep: remove regif parameter

The argument regif was removed from the shell command in RIOT-OS#18053,
so there is not much need to keep it in the ShellInteraction for that command.

dist/pythonlibs/riotctrl_shell/cord_ep.py

@@ -117,11 +117,8 @@ def cord_ep_cmd(self, cmd, args=None, timeout=-1, async_=False):
     def cord_ep_info(self, timeout=-1, async_=False):
         return self.cord_ep_cmd(self.INFO, None, timeout, async_)
 
-    def cord_ep_register(self, uri, regif=None, timeout=-1, async_=False):
-        args = [uri]
-        if regif is not None:
-            args.append(regif)
-        return self.cord_ep_cmd(self.REGISTER, args, timeout, async_)
+    def cord_ep_register(self, uri, timeout=-1, async_=False):
+        return self.cord_ep_cmd(self.REGISTER, (uri,), timeout, async_)
 
     def cord_ep_discover(self, uri, timeout=-1, async_=False):
         return self.cord_ep_cmd(self.DISCOVER, (uri,), timeout, async_)

dist/pythonlibs/riotctrl_shell/tests/test_cord_ep.py

@@ -55,12 +55,12 @@ def test_cord_ep_parser_empty():
 
 
 @pytest.mark.parametrize(
-    "uri,regif,expected",
+    "uri,expected",
     [
-        ("[fe80::1]", None, "cord_ep register [fe80::1]"),
-        ("[fe80::1%iface0]", None, "cord_ep register [fe80::1%iface0]"),
-        ("[fe80::1]:5684", None, "cord_ep register [fe80::1]:5684"),
-        ("[fe80::1]", "/regif", "cord_ep register [fe80::1] /regif"),
+        ("coap://[fe80::1]", "cord_ep register coap://[fe80::1]"),
+        ("coap://[fe80::1%iface0]", "cord_ep register coap://[fe80::1%iface0]"),
+        ("coap://[fe80::1]:5684", "cord_ep register coap://[fe80::1]:5684"),
+        ("coap://[fe80::1]/regif", "cord_ep register coap://[fe80::1]/regif"),
     ]
 )
 def test_cord_ep_register(uri, regif, expected):