Remove redundant API method from foreman inventory (#41720)

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>

contrib/inventory/foreman.py

@@ -229,10 +229,6 @@ class ForemanInventory(object):
 
         return params
 
-    def _get_facts_by_id(self, hid):
-        url = "%s/api/v2/hosts/%s/facts" % (self.foreman_url, hid)
-        return self._get_json(url)
-
     def _get_facts(self, host):
         """Fetch all host facts of the host"""
         if not self.want_facts: